Update path to requirements in CI workflow

.github/workflows/ci.yml

@@ -26,7 +26,7 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        pip install -r space2stats_api/app/requirements.txt
+        pip install -r space2stats_api/src/requirements.txt
         pip install pre-commit
 
     - name: Set PYTHONPATH