fix: support master branch trigger (casdoor#247)

Signed-off-by: sh1luo <[email protected]>

Author: sh1luo

.github/workflows/release.yml

@@ -1,6 +1,8 @@
 name: Release
 
-on: [push, pull_request]
+on:
+  push:
+    branches: [ master ]
 
 jobs:
   frontend:

.releaserc.json

@@ -2,6 +2,7 @@
   "debug": true,
   "branches": [
     "+([0-9])?(.{+([0-9]),x}).x",
+    "master",
     {
       "name": "rc"
     },