Updated ubunut version for CI

Author: OstafinL

.github/workflows/ci.yaml

@@ -10,7 +10,7 @@ on:
 jobs:
     cs-fix:
         name: Run code style check
-        runs-on: "ubuntu-20.04"
+        runs-on: "ubuntu-24.04"
         strategy:
             matrix:
                 php:
@@ -35,7 +35,7 @@ jobs:
 
     tests:
         name: Unit tests
-        runs-on: "ubuntu-20.04"
+        runs-on: "ubuntu-24.04"
         timeout-minutes: 15
 
         strategy: