Use Python 3.8.0 for integration tests (#1054)

Author: kmazurek

.github/workflows/rust.yml

@@ -157,7 +157,7 @@ jobs:
       - name: Configure python
         uses: actions/setup-python@v2
         with:
-          python-version: '3.8'
+          python-version: '3.8.0'
 
       - name: Configure poetry
         uses: Gr1N/setup-poetry@v4