Deploy docs for release 1.6.0 (#3022)

Deploy docs for release 1.6.0

Author: bjee19

.github/workflows/docs-build-push.yml

@@ -23,6 +23,12 @@ on:
     paths:
     - "site/**"
 
+  push:
+    branches:
+    - release-1.6
+    paths:
+    - "site/**"
+
 concurrency:
   group: ${{ github.ref_name }}-docs-push
   cancel-in-progress: true
@@ -58,6 +64,8 @@ jobs:
       doc_type: "hugo"
       environment: ${{ inputs.environment }}
       force_hugo_theme_version: ${{ inputs.hugo_theme_override }}
+      auto_deploy_branch: "release-1.6"
+      auto_deploy_env: "prod"
     secrets:
       AZURE_CREDENTIALS: ${{ secrets.AZURE_CREDENTIALS_DOCS }}
       AZURE_KEY_VAULT: ${{ secrets.AZURE_KEY_VAULT_DOCS }}