Update check-cppcheck-llpc.yml to ubuntu 22.04

Author: qiaojbao

.github/workflows/check-cppcheck-llpc.yml

@@ -6,7 +6,7 @@ on:
 jobs:
   cppcheck:
     name: cppcheck
-    runs-on: "ubuntu-20.04"
+    runs-on: "ubuntu-22.04"
     steps:
       - name: Setup environment
         run: |