docs: update references to renovatebot/github-action to v40.2.8

| datasource      | package                   | from    | to      |
| --------------- | ------------------------- | ------- | ------- |
| github-releases | renovatebot/github-action | v40.2.7 | v40.2.8 |
| github-tags     | renovatebot/github-action | v40.2.7 | v40.2.8 |

Author: renovate[bot]

README.md

@@ -99,7 +99,7 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4.1.7
       - name: Self-hosted Renovate
-        uses: renovatebot/github-action@v40.2.7
+        uses: renovatebot/github-action@v40.2.8
         with:
           docker-cmd-file: .github/renovate-entrypoint.sh
           docker-user: root
@@ -136,7 +136,7 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4.1.7
       - name: Self-hosted Renovate
-        uses: renovatebot/github-action@v40.2.7
+        uses: renovatebot/github-action@v40.2.8
         with:
           token: ${{ secrets.RENOVATE_TOKEN }}
           docker-volumes: |
@@ -188,7 +188,7 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4.1.7
       - name: Self-hosted Renovate
-        uses: renovatebot/github-action@v40.2.7
+        uses: renovatebot/github-action@v40.2.8
         with:
           renovate-image: myproxyhub.domain.com/renovate/renovate
           token: ${{ secrets.RENOVATE_TOKEN }}
@@ -205,7 +205,7 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4.1.7
       - name: Self-hosted Renovate
-        uses: renovatebot/github-action@v40.2.7
+        uses: renovatebot/github-action@v40.2.8
         with:
           token: ${{ secrets.RENOVATE_TOKEN }}
 ```
@@ -227,7 +227,7 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4.1.7
       - name: Self-hosted Renovate
-        uses: renovatebot/github-action@v40.2.7
+        uses: renovatebot/github-action@v40.2.8
         with:
           renovate-version: 38.72.1
           token: ${{ secrets.RENOVATE_TOKEN }}
@@ -244,7 +244,7 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4.1.7
       - name: Self-hosted Renovate
-        uses: renovatebot/github-action@v40.2.7
+        uses: renovatebot/github-action@v40.2.8
         with:
           renovate-version: full
           token: ${{ secrets.RENOVATE_TOKEN }}
@@ -279,7 +279,7 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4.1.7
       - name: Self-hosted Renovate
-        uses: renovatebot/github-action@v40.2.7
+        uses: renovatebot/github-action@v40.2.8
         with:
           configurationFile: example/renovate-config.js
           token: ${{ secrets.RENOVATE_TOKEN }}
@@ -292,7 +292,7 @@ If you want to use the Renovate Action on a GitHub Enterprise instance you have
 ```yml
 ....
       - name: Self-hosted Renovate
-        uses: renovatebot/github-action@v40.2.7
+        uses: renovatebot/github-action@v40.2.8
         with:
           configurationFile: example/renovate-config.js
           token: ${{ secrets.RENOVATE_TOKEN }}
@@ -337,7 +337,7 @@ jobs:
         uses: actions/checkout@v4.1.7
 
       - name: Self-hosted Renovate
-        uses: renovatebot/github-action@v40.2.7
+        uses: renovatebot/github-action@v40.2.8
         with:
           configurationFile: example/renovate-config.js
           token: '${{ steps.get_token.outputs.token }}'
@@ -352,7 +352,7 @@ For example:
 
 ```yaml
 - name: Self-hosted Renovate
-  uses: renovatebot/github-action@v40.2.7
+  uses: renovatebot/github-action@v40.2.8
   with:
     token: '${{ steps.get_token.outputs.token }}'
   env:
@@ -376,7 +376,7 @@ For example if you wish to pass through some credentials for a [host rule](https
          - name: Checkout
            uses: actions/checkout@v4.1.7
          - name: Self-hosted Renovate
-           uses: renovatebot/github-action@v40.2.7
+           uses: renovatebot/github-action@v40.2.8
            with:
              configurationFile: example/renovate-config.js
              token: ${{ secrets.RENOVATE_TOKEN }}
@@ -413,7 +413,7 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4.1.7
       - name: Self-hosted Renovate
-        uses: renovatebot/github-action@v40.2.7
+        uses: renovatebot/github-action@v40.2.8
         with:
           configurationFile: example/renovate-config.js
           token: ${{ secrets.RENOVATE_TOKEN }}
@@ -504,7 +504,7 @@ jobs:
           sudo chown -R runneradmin:root /tmp/renovate/
           ls -R $cache_dir
 
-      - uses: renovatebot/github-action@v40.2.7
+      - uses: renovatebot/github-action@v40.2.8
         with:
           configurationFile: renovate.json5
           token: ${{ secrets.RENOVATE_TOKEN }}
@@ -542,7 +542,7 @@ To enable debug logging, add the environment variable `LOG_LEVEL: 'debug'` to th
 
 ```yml
 - name: Self-hosted Renovate
-  uses: renovatebot/github-action@v40.2.7
+  uses: renovatebot/github-action@v40.2.8
   with:
     configurationFile: example/renovate-config.js
     token: ${{ secrets.RENOVATE_TOKEN }}