ISO 8601 Z at the end supperted by python>=3.11; adjusted in unittest-workflow.yml

Author: konstntokas

.github/workflows/unitest-workflow.yml

@@ -19,7 +19,7 @@ jobs:
         with:
           cache-env: true
           extra-specs: |
-            python=3.10
+            python=3.11
 
       - name: Run unit tests
         shell: bash -l {0}