chore: Symlink rcmdnk/file tap to $GITHUB_WORKSPACE in CI Re-tap step

Author: rcmdnk

.github/workflows/test.yml

@@ -170,8 +170,9 @@ jobs:
           pre-commit: 0
           tmate: 0
       - name: Re-tap
-        # setup-homebrew tries to remove symlinks for which installed by brew
-        # tap, event if it is untapped.
+        # setup-homebrew makes links from $GITHUB_WORKSPACE to taps.
+        # And it tries to remove these links at post setup event if it is
+        # untapped.
         # Need to tap again after test cleanup otherwise Post Setup Homebrew
         # makes an error.
-        run: brew tap rcmdnk/file
+        run: ln -s "$GITHUB_WORKSPACE" "$(brew --repo rcmdnk/homebrew-file)"