ci: update ubuntu action runner image to 22.04

Author: pczeglik-iohk

.github/workflows/ci.yml

@@ -16,7 +16,7 @@ concurrency:
 jobs:
   verify:
     name: Verify
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     steps:
       - name: Checkout
         uses: actions/checkout@v4

.github/workflows/git-checks.yml

@@ -7,7 +7,7 @@ on:
 jobs:
   block-fixup:
     if: github.event.pull_request.draft == false
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
 
     steps:
       - uses: actions/checkout@v4

.github/workflows/publish.yml

@@ -13,7 +13,7 @@ jobs:
   publish:
     name: Publish
     if: github.event_name == 'push' && !startsWith(github.event.head_commit.message, 'chore(release):')
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     steps:
       - name: Checkout
         uses: actions/checkout@v4