Preinstall python dependencies before executing `qmk`. (#16874)

.github/workflows/develop_api.yml

@@ -24,7 +24,9 @@ jobs:
         persist-credentials: false
 
     - name: Generate API Data
-      run: qmk generate-api
+      run: |
+        python3 -m pip install -r requirements-dev.txt
+        qmk generate-api
 
     - name: Upload API Data
       uses: jakejarvis/s3-sync-action@master