modified openapi workflow to be in line with new skeleton structure

Author: Rose Yemelyanova

.github/workflows/openapi.yml

@@ -24,7 +24,7 @@ jobs:
       if: ${{ !matrix.deploy }}
       run: |
         python -m pip install --upgrade pip
-        pip install .[dev] -r requirements.txt
+        pip install -e .[dev]
 
     - name: Make openapi.json
       run: |