Add back drupal 9.3.

.github/workflows/build-2.x.yml

@@ -24,7 +24,7 @@ jobs:
       matrix:
         php-versions: ["7.4", "8.0", "8.1"]
         test-suite: ["kernel", "functional", "functional-javascript"]
-        drupal-version: ["9.4.x", "9.5.x-dev", "10.0.x-dev"]
+        drupal-version: ["9.3.x", "9.4.x", "9.5.x-dev", "10.0.x-dev"]
         mysql: ["8.0"]
         allowed_failure: [false]
         include: