ci: update commit-message-based-labels job to be called labels

Using the job name labels results in a more readable and better looking Github status.

(cherry picked from commit 35bf557)

Author: josephperrott

.github/workflows/dev-infra.yml

@@ -5,7 +5,7 @@ on:
     types: [opened, synchronize, reopened]
 
 jobs:
-  commit_message_based_labels:
+  labels:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2