update branch prefix

Author: leniatgh

.github/workflows/main.yml

@@ -27,7 +27,7 @@ jobs:
   automerge:
     runs-on: ubuntu-latest
     needs: build
-    if: ${{ github.actor == 'AzureSDKAutomation' && startsWith(github.head_ref, 'sdkAutomation') }}
+    if: ${{ github.actor == 'AzureSDKAutomation' && startsWith(github.head_ref, 'sdkAuto/') }}
     steps:
       - uses: actions/checkout@v2
 
@@ -60,4 +60,4 @@ jobs:
         uses: "pascalgn/automerge-action@v0.12.0"
         env:
           GITHUB_TOKEN: "${{ secrets.GITHUB_TOKEN }}"          
-          MERGE_LABELS: ""
+          MERGE_LABELS: ""