Update python-app.yml

Author: priyagupta108

.github/workflows/python-app.yml

@@ -12,4 +12,7 @@ jobs:
         uses: actions/setup-python@v5
         with:
           python-version: 3.12
-          cache: 'pip'
+          cache: 'pip'
+
+      - name: Install dependencies
+        run:  pip install