[CI] Updates GitHub Actions

Author: picandocodigo

.github/workflows/tests.yml

@@ -6,6 +6,7 @@ on:
   pull_request:
     branches:
       - main
+  workflow_dispatch:
 jobs:
   tests:
     env:
@@ -14,8 +15,8 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        rails: [ '6.1', '7.0', '7.1' ]
-        ruby: ['3.1', '3.2', '3.3']
+        rails: ['6.1', '7.0', '7.1']
+        ruby: ['3.1', '3.2', '3.3', '3.4']
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v4