Make sure golangci-lint can be found

.github/workflows/linux-ci.yml

@@ -9,12 +9,20 @@ jobs:
   validate:
     runs-on: ubuntu-22.04
     steps:
+      # golangci-lint is required by test.sh. Latest version here if you want
+      # to bump it, version number is at the end of the "curl | sh"
+      # commandline below:
+      # https://github.com/golangci/golangci-lint/releases/latest
       - name: Install golangci-lint
-        # golangci-lint is required by test.sh. Latest version here if you want
-        # to bump it, version number is at the end of the "curl | sh"
-        # commandline below:
-        # https://github.com/golangci/golangci-lint/releases/latest
         run: curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s -- -b "$(go env GOPATH)"/bin v1.50.1
+
+      # Source: https://www.scivision.dev/github-actions-path-append/
+      #
+      # Required for the golangci-lint that we just installed to work.
+      - name: Add GOPATH/bin to PATH
+        run: echo "$(go env GOPATH)/bin" >> "$GITHUB_PATH"
+
       - name: Check out repository code
         uses: actions/checkout@v2
+
       - run: ./test.sh