Fixed package-check error

Author: fungss

.github/workflows/ci.yaml

@@ -31,9 +31,9 @@ jobs:
         run: | 
           python -m pip install -r requirements.txt
 
-      - name: Check installed packages
+      - name: Check if installed packages confirm with requirements.txt
         run: |
-          python freeze -r requirements.txt
+          pip freeze -r requirements.txt
 
       - name: Run tests
         run: |