Exclude build folder from lint workflow

.github/workflows/lint.yml

@@ -5,10 +5,12 @@ on:
       - '**'
     paths:
       - '**.php'
+      - '!build/**'
   pull_request:
     types: [opened, edited, reopened, ready_for_review]
     paths:
       - '**.php'
+      - '!build/**'
   workflow_dispatch:
 
 concurrency:
@@ -24,7 +26,7 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v3
 
-      # User PHP 7.4 here for compatibility with the WordPress codesniffer rules.
+      # Use PHP 7.4 here for compatibility with the WordPress codesniffer rules.
       - name: Setup PHP
         uses: shivammathur/setup-php@v2
         with:
@@ -36,6 +38,11 @@ jobs:
         with:
           SUFFIX_FILTER: .php
 
+      - name: Exclude build folder from diff
+        run: |
+          export GIT_DIFF=$(echo "$GIT_DIFF" | grep -v '^build/')
+          echo "Filtered diff: $GIT_DIFF"
+
       - name: Get Composer cache directory
         id: composer-cache
         run: echo "dir=$(composer config cache-files-dir)" >> $GITHUB_OUTPUT