Add docs-build to Dependabot Auto-Merge

Signed-off-by: Josh Cummings <3627351+jzheaux@users.noreply.github.com>

Author: jzheaux

.github/workflows/auto-merge-dependabot.yml

@@ -5,6 +5,7 @@ on:
     branches:
       - main
       - '*.x'
+      - 'docs-build'
 
 run-name: Merge Dependabot PR ${{ github.ref_name }}