Use ubuntu-22.04 in CI

.github/workflows/pr.yml

@@ -4,14 +4,14 @@ on: [pull_request]
 
 jobs:
   clang-format:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-22.04
     steps:
     - uses: actions/checkout@v2
     - name: clang-format
       run: |
         docker run --rm -v ${PWD}:/src  wiiuenv/clang-format:13.0.0-2 -r ./source ./include
   build-lib:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-22.04
     needs: clang-format
     steps:
     - uses: actions/checkout@v2

.github/workflows/push_image.yml

@@ -5,7 +5,7 @@ on:
       - master
 jobs:
   clang-format:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-22.04
     steps:
     - uses: actions/checkout@v2
     - name: clang-format