Fix auth length

Signed-off-by: Charlie Truong <chtruong@nvidia.com>

Author: chtruong814

.github/workflows/build-trtllm-vllm-image.yml

@@ -13,6 +13,7 @@
 # limitations under the License.
 name: Build TRT-LLM and vLLM image
 on:
+  push:
   workflow_dispatch:
     inputs:
       base_image_tag:
@@ -115,6 +116,7 @@ jobs:
           client-id: ${{ secrets.AZURE_CLIENT_ID }}
           tenant-id: ${{ secrets.AZURE_TENANT_ID }}
           subscription-id: ${{ secrets.AZURE_SUBSCRIPTION_ID }}
+          auth-type: IDENTITY
 
       - name: Azure ACR Login
         shell: bash