chore: make possible cancel action and fix security issue

Signed-off-by: Vitor Mattos <1079143+vitormattos@users.noreply.github.com>

Author: vitormattos

.github/workflows/phpunit.yml

@@ -1,5 +1,13 @@
 name: PHPUnit
 on: pull_request
+
+permissions:
+  contents: read
+
+concurrency:
+  group: phpunit-sqlite-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
 jobs:
   phpunit:
     name: PHP ${{ matrix.php }}