Update codeql.yml

Author: dail8859

.github/workflows/codeql.yml

@@ -12,7 +12,7 @@ on:
 jobs:
   analyze:
     name: Analyze
-    runs-on: 'ubuntu-latest'
+    runs-on: 'ubuntu-20.04'
     timeout-minutes: 360
     permissions:
       actions: read