Fix unit tests runner

Author: alexandrujircan

.github/workflows/tests.yml

@@ -8,7 +8,7 @@ on:
 
 jobs:
   unit-tests:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
 
     strategy:
       matrix:
@@ -17,7 +17,7 @@ jobs:
     steps:
       - uses: actions/checkout@v3
       - name: Set up Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v5
         with:
           python-version: ${{ matrix.python-version }}