Disable setup-go cache for go 1.13.x.

actions/setup-go#304 has been fixed in main,
but we won't get the fix until the next release.

.github/workflows/go.yml

@@ -22,11 +22,21 @@ jobs:
     steps:
       - uses: actions/checkout@v3
 
-      - uses: actions/setup-go@v3
+      - if: ${{ matrix.go != '1.13.x' }}
+        uses: actions/setup-go@v3
         with:
           go-version: ${{ matrix.go }}
           cache: true
 
+      # Workaround for https://github.com/actions/setup-go/issues/304.
+      # TODO: Remove workaround after next release of setup-go
+      - if: ${{ matrix.go == '1.13.x' }}
+        name: Run actions/setup-go@v3 (cache disabled)
+        uses: actions/setup-go@v3
+        with:
+          go-version: ${{ matrix.go }}
+          cache: false
+
       - run: go build -v github.com/rkoesters/xkcd/...
       - run: go test -v -cover github.com/rkoesters/xkcd/...
       - run: go vet -v github.com/rkoesters/xkcd/...