Try to get Actions and the requirements.txt files matched

Author: webbnh

.github/workflows/ci.yml

@@ -23,8 +23,8 @@ jobs:
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
-          pip install -r requirements.txt
-          pip install -r tests/requirements.txt
+          pip install -r relay/requirements.txt
+          pip install -r relay/tests/requirements.txt
       - name: Run Black
         run: black --check .
       - name: Run Flake8