Add file diff

Author: andrewmy

.github/workflows/ci.yml

@@ -9,7 +9,7 @@ jobs:
 
       - name: Set changed files
         run: |
-          echo "PKG_PHP_CHANGED_FILES=$(./bin/git-find-changed-php-files.sh "${{ env.GITHUB_BASE_REF }} ${{ env.GITHUB_SHA }}")"
+          echo "PKG_PHP_CHANGED_FILES=$(./bin/git-find-changed-php-files.sh "${{ github.base_ref }} ${{ github.sha }}")"
 
       - name: Get Composer Cache Directory
         id: composer-cache
@@ -43,7 +43,7 @@ jobs:
 
       - name: Set changed files
         run: |
-          echo "PKG_PHP_CHANGED_FILES=$(./bin/git-find-changed-php-files.sh "${{ env.GITHUB_BASE_REF }} ${{ env.GITHUB_SHA }}")"
+          echo "PKG_PHP_CHANGED_FILES=$(./bin/git-find-changed-php-files.sh "${{ github.base_ref }} ${{ github.sha }}")"
 
       - name: Get Composer Cache Directory
         id: composer-cache