chore: downgrade ubuntu

Author: Justintime50

.github/workflows/ci.yml

@@ -8,7 +8,7 @@ on:
 
 jobs:
   lint:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     steps:
       - uses: actions/checkout@v3
       - name: set up php
@@ -20,7 +20,7 @@ jobs:
       - name: lint
         run: make lint
   run-tests:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     strategy:
       matrix:
         phpversion: ["7.4", "8.0", "8.1", "8.2"]