Updated build pipeline

Author: MrMatAP

.github/workflows/build.yml

@@ -71,8 +71,8 @@ jobs:
       run: |
         export PYTHONUSERBASE=${HOME}/.local
         pip install --user -r requirements.txt -r requirements.dev.txt
-        PYTHONPATH=${GITHUB_WORKSPACE} python -m pytest --cov=mrmat_python_api_fastapi
-        PYTHONPATH=${GITHUB_WORKSPACE} python -m build --wheel -n
+        PYTHONPATH=${GITHUB_WORKSPACE}/src python -m pytest --cov=mrmat_python_api_fastapi
+        PYTHONPATH=${GITHUB_WORKSPACE}/src python -m build --wheel -n
 
     - name: Upload test results
       uses: actions/upload-artifact@v4