Checkout the repo, needed by setup python

Contributes to CURA-9459

.github/workflows/unit-test.yml

@@ -134,10 +134,13 @@ jobs:
 
     publish-test-results:
         runs-on: ubuntu-20.04
-        needs: [ conan-recipe-version ]
+        needs: [ testing ]
         if: success() || failure()
 
         steps:
+            -   name: Checkout
+                uses: actions/checkout@v3
+
             -   name: Setup Python and pip
                 uses: actions/setup-python@v4
                 with: