Add actionlint to lint workflow (#762)

Adds a job for actionlint to lint workflow files and prevent merging if
they have errors

Author: lucacome

.github/workflows/lint.yml

@@ -27,10 +27,12 @@ jobs:
     steps:
       - name: Checkout Repository
         uses: actions/checkout@c85c95e3d7251135ab7dc9ce3241c5835cc595a9 # v3.5.3
+
       - name: Setup Golang Environment
         uses: actions/setup-go@fac708d6674e30b6ba41289acaab6d4b75aa0753 # v4.0.1
         with:
           go-version-file: go.mod
+
       - name: Lint Code
         uses: golangci/golangci-lint-action@639cd343e1d3b897ff35927a75193d57cfcba299 # v3.6.0
         with:
@@ -43,21 +45,35 @@ jobs:
     steps:
       - name: Checkout Repository
         uses: actions/checkout@c85c95e3d7251135ab7dc9ce3241c5835cc595a9 # v3.5.3
+
       - name: Get Prettier version
         id: prettier-version
         run: |
           echo "version=$(jq -r .devDependencies.prettier ${{ github.workspace }}/internal/nginx/modules/package.json)" >> $GITHUB_OUTPUT
+
       - name: Run Prettier on NJS code
         id: prettier-run
         uses: rutajdash/prettier-cli-action@9e27606a9e18d40b6b4a2b4159e780241d2fbb3c # v1.0.1
         with:
           config_path: ${{ github.workspace }}/internal/nginx/modules/.prettierrc
           file_pattern: ${{ github.workspace }}/internal/nginx/modules/**/*.js
           prettier_version: ${{ steps.prettier-version.outputs.version }}
+
       - name: Prettier Output
         if: failure()
         shell: bash
         run: |
           echo "The following files are not formatted:"
           echo "${{steps.prettier-run.outputs.prettier_output}}"
           echo "Run \"make njs-fmt\" locally to format the code"
+
+  actionlint:
+    name: Actionlint
+    runs-on: ubuntu-22.04
+    steps:
+      - name: Checkout Repository
+        uses: actions/checkout@c85c95e3d7251135ab7dc9ce3241c5835cc595a9 # v3.5.3
+
+      - uses: reviewdog/action-actionlint@42de1e3a0f52d5f8b8390894de87bc603844e530 # v1.37.0
+        with:
+          actionlint_flags: -shellcheck ""