ci: fix docs build check workflow failing on node post setup (#157)

## Description

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### Type of change

- [ ] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality to not work as expected)
- [ ] Documentation update (improves or adds clarity to existing
documentation)

### Tested on

- [ ] iOS
- [ ] Android

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### Related issues

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### Checklist

- [ ] I have performed a self-review of my code
- [ ] I have commented my code, particularly in hard-to-understand areas
- [ ] I have updated the documentation accordingly
- [ ] My changes generate no new warnings

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Author: chmjkb

.github/workflows/docs-build-check.yml

@@ -6,8 +6,13 @@ on:
       - main
     paths:
       - 'docs/**'
-  workflow_dispatch:
-
+      - '.github/workflows/docs-build-check.yml'
+  pull_request:
+    branches:
+      - main
+    paths:
+      - 'docs/**'
+      - '.github/workflows/docs-build-check.yml'
 jobs:
   check:
     if: github.repository == 'software-mansion/react-native-executorch'
@@ -18,17 +23,15 @@ jobs:
     env:
       WORKING_DIRECTORY: docs
     steps:
-      - name: checkout
-        uses: actions/checkout@v2
+      - name: Checkout repository
+        uses: actions/checkout@v3
       - name: Use Node.js 18
         uses: actions/setup-node@v2
         with:
           node-version: 18
-          cache: 'yarn'
       - name: Install node dependencies
         working-directory: ${{ env.WORKING_DIRECTORY }}
-        # the mkdir is a workaround to avoid this: https://github.com/actions/setup-node/issues/317
-        run: mkdir -p .yarn/cache && yarn
+        run: yarn install --immutable
       - name: Generate docs
         working-directory: ${{ env.WORKING_DIRECTORY }}
         run: yarn build