bump: use ubuntu-22.04 (#55)

Author: Borda

.github/workflows/ci_install-pkg.yml

@@ -8,7 +8,7 @@ on: # Trigger the workflow on push or pull request, but only for the main branch
 
 jobs:
   pkg-check:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
 
     steps:
       - uses: actions/checkout@v4

.github/workflows/code-format.yml

@@ -8,7 +8,7 @@ on: # Trigger the workflow on push or pull request, but only for the main branch
 
 jobs:
   typing-mypy:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     steps:
       - uses: actions/checkout@v4
       - uses: actions/setup-python@v5