Adapt workflows to ubuntu-20.04 brownout

Author: sovrasov

.github/workflows/pre_commit.yml

@@ -15,7 +15,7 @@ on:
 
 jobs:
   Code-Quality-Checks:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     steps:
       - name: CHECKOUT REPOSITORY
         uses: actions/checkout@v4

.github/workflows/test_precommit.yml

@@ -126,7 +126,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-20.04, ubuntu-22.04, ubuntu-24.04]
+        os: [ubuntu-22.04, ubuntu-24.04]
         python-version: [3.9, "3.10", "3.11"]
         exclude:
           - os: ubuntu-24.04