add workflow trigger

Author: umbynos

.github/workflows/generate-index.yml

@@ -2,15 +2,14 @@ name: Generate Index
 
 # See: https://docs.github.com/en/actions/reference/events-that-trigger-workflows
 on:
-  pull_request:
-    branches:
-      - umbynos/index_generation
   push:
+    branches:
     paths:
       - "generator/**"
       - "firmwares/**"
       - "poetry.lock"
       - "pyproject.toml"
+      - "workflows/generate-index.yml"
   workflow_dispatch:
   repository_dispatch: