refactor(ci): drop redundant if condition

The release job had a broad `if:` condition that just re-checked the
event type. Simplify: filter in the trigger, drop the if.

Also add `repository_dispatch` to the triggers for consistency.

Author: 3alpha

.github/workflows/main.yml

@@ -7,12 +7,12 @@ on:
     paths-ignore:
       - "README.md"
   workflow_dispatch:
+  repository_dispatch:
 
 jobs:
   release:
     name: Release
     runs-on: ubuntu-latest
-    if: github.event_name == 'push' || github.event_name == 'workflow_dispatch'
     steps:
       - uses: actions/checkout@v7
       - uses: actions/setup-node@v6