fix python version used in unit-tests.yml

Author: AlyaGomaa

.github/workflows/unit-tests.yml

@@ -95,7 +95,7 @@ jobs:
     - name: Set up Python
       uses: actions/setup-python@v5
       with:
-        python-version: 3.10
+        python-version: 3.10.12
 
     - name: Restore APT cache
       id: apt-cache