feat(ci): install helm-docs directly instead of using whole brew setup (backport #41629) (#42113)

Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>

.github/workflows/pre-commit.yml

@@ -28,19 +28,18 @@ jobs:
         with:
           persist-credentials: false
           submodules: recursive
+
       - name: Setup Python
         uses: ./.github/actions/setup-backend/
         with:
           python-version: ${{ matrix.python-version }}
-      - name: Enable brew and helm-docs
-        # Add brew to the path - see https://github.com/actions/runner-images/issues/6283
-        run: |
-          echo "/home/linuxbrew/.linuxbrew/bin:/home/linuxbrew/.linuxbrew/sbin" >> $GITHUB_PATH
-          eval "$(/home/linuxbrew/.linuxbrew/bin/brew shellenv)"
-          echo "HOMEBREW_PREFIX=$HOMEBREW_PREFIX" >>"${GITHUB_ENV}"
-          echo "HOMEBREW_CELLAR=$HOMEBREW_CELLAR" >>"${GITHUB_ENV}"
-          echo "HOMEBREW_REPOSITORY=$HOMEBREW_REPOSITORY" >>"${GITHUB_ENV}"
-          brew install norwoodj/tap/helm-docs
+
+      - name: Setup Go
+        uses: actions/setup-go@924ae3a1cded613372ab5595356fb5720e22ba16 # v6.5.0
+
+      - name: Install helm-docs
+        run: go install github.com/norwoodj/helm-docs/cmd/helm-docs@v1.14.2
+
       - name: Setup Node.js
         uses: actions/setup-node@53b83947a5a98c8d113130e565377fae1a50d02f # v6
         with: