Update ci.yml

.github/workflows/ci.yml

@@ -14,13 +14,18 @@ jobs:
   pest:
     name: Tests (Pest)
     runs-on: ubuntu-latest
-    laravel: [8.*, 9.*]
-    dependency-version: [prefer-lowest, prefer-stable]
-    include:
-      -   laravel: 9.*
-          testbench: 7.*
-      -   laravel: 8.*
-          testbench: 6.*
+    strategy:
+      fail-fast: true
+      matrix:
+        os: [ubuntu-latest]
+        php: [8.0]
+        laravel: [9.*, 8.*]
+        dependency-version: [prefer-stable]
+        include:
+          -   laravel: 9.*
+              testbench: 7.*
+          -   laravel: 8.*
+              testbench: ^6.9
 
     steps:
     - uses: actions/checkout@v2