Update workflow

Author: ivanvermeyen

.github/workflows/run-tests.yml

@@ -1,14 +1,13 @@
-name: run-tests
+name: Tests
 
 on: [ push, pull_request ]
 
 jobs:
   test:
-    runs-on: ${{ matrix.os }}
+    runs-on: ubuntu-latest
     strategy:
       fail-fast: true
       matrix:
-        os: [ ubuntu-latest ]
         php: [ 8.0, 8.1 ]
         laravel: [ 8.* ]
         dependency-version: [ prefer-stable ]