Merge pull request #6264 from Codeception/run-tests-on-php-8.1

[CI] Run tests on PHP 8.1

Author: Naktibalda

.github/workflows/build.yml

@@ -20,7 +20,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest]
-        php: ["5.6", "7.0", "7.1", "7.2", "7.3", "7.4", "8.0"]
+        php: ["5.6", "7.0", "7.1", "7.2", "7.3", "7.4", "8.0", "8.1"]
 
     steps:
       - name: Checkout
@@ -90,7 +90,7 @@ jobs:
       matrix:
         os: [windows-latest]
 
-        php: ["7.0", "7.1", "7.2", "7.3", "7.4", "8.0"]
+        php: ["7.0", "7.1", "7.2", "7.3", "7.4", "8.0", "8.1"]
 
     steps:
       - name: Checkout