fix: git log retrieval issues (#578)

Author: shwetha-manvinkurke

.github/workflows/deploy.yml

@@ -12,6 +12,8 @@ jobs:
     steps:
       - name: Checkout twilio-python
         uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
 
       - name: Login to Docker Hub
         uses: docker/login-action@v1