gh-actions/github/checkout: Fix non/token auth (#902)

Signed-off-by: Ryan Northey <ryan@synca.io>

gh-actions/github/checkout/action.yml

@@ -25,6 +25,7 @@ runs:
   - name: Fetch token for app auth
     id: appauth
     uses: envoyproxy/toolshed/gh-actions/appauth@actions-v0.0.23
+    if: ${{ inputs.app_id && inputs.app_key }}
     with:
       app_id: ${{ inputs.app_id }}
       key: ${{ inputs.app_key }}
@@ -35,14 +36,15 @@ runs:
       yaml: ${{ inputs.config || '{}' }}
   - name: Add auth token to config
     id: config
+    if: ${{ steps.appauth.outputs.token }}
     uses: envoyproxy/toolshed/gh-actions/jq@actions-v0.0.23
     with:
       input: ${{ steps.parsed.outputs.json }}
       filter: |
         . + { "token": "${{ steps.appauth.outputs.token }}" }
   - uses: actions/checkout@v4
     name: Checkout repository
-    with: ${{ fromJSON(steps.config.outputs.value) }}
+    with: ${{ fromJSON(steps.appauth.outputs.token && steps.config.outputs.value || steps.parsed.outputs.json) }}
   - name: Configure committer
     if: ${{ inputs.committer-name && inputs.committer-email }}
     run: |