4.1.x Actions workflow: naming, trigger when management UI code changes

Author: michaelklishin

.github/workflows/release-alphas.yaml renamed to .github/workflows/release-4.1.x-alphas.yaml

@@ -1,11 +1,12 @@
-name: Trigger an alpha release build
+name: Trigger a 4.1.x alpha release build
 on:
   workflow_dispatch:
   push:
     branches:
       - "main"
     paths:
       - "deps/*/src/**"
+      - 'deps/rabbitmq_management/priv/**'
       - ".github/workflows/**"
 env:
   DEV_WORKFLOW_REPOSITORY: "rabbitmq/server-packages"