Add comment remembering special settings for golangci-lint-action

golangci-lint-action caching conflicts with the setup-go cache and `go get` above. See golangci/golangci-lint-action#23

Author: DavidS-ovm

.github/workflows/tests.yml

@@ -45,4 +45,4 @@ jobs:
         uses: golangci/golangci-lint-action@v3
         with:
           version: v1.53
-          skip-pkg-cache: true
+          skip-pkg-cache: true # golangci-lint-action caching conflicts with the setup-go cache and `go get` above. See https://github.com/golangci/golangci-lint-action/issues/23