CI/CD: Bump deprecated Ubuntu runner 20.04 to 22.04.

Author: zoj613

.github/workflows/build-and-test.yml

@@ -18,7 +18,7 @@ jobs:
 
     strategy:
       matrix:
-        os: [ ubuntu-20.04, macOS-13, windows-2019 ]
+        os: [ ubuntu-22.04, macOS-13, windows-2019 ]
         python-version: [ '3.10', 'pypy3.10', '3.11', '3.12', '3.13' ]
       fail-fast: false
 

.github/workflows/release.yml

@@ -17,7 +17,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ ubuntu-20.04, macOS-13, windows-2019 ]
+        os: [ ubuntu-22.04, macOS-13, windows-2019 ]
       fail-fast: false
 
     steps: