feat: 添加手动触发工作流的支持

Author: flycran

.github/workflows/generate-svg.yml

@@ -1,6 +1,7 @@
 name: Daily Gravity SVG
 
 on:
+  workflow_dispatch:
   schedule:
     # 每天 UTC 0:00 运行（北京时间 8:00）
     - cron: '0 0 * * *'

README.md

@@ -52,6 +52,9 @@ Inspired by [Orta Therox](https://github.com/Orta). Thanks Orta for your outstan
 name: Generate Contribution Gravity
 
 on:
+  workflow_dispatch:
+  schedule:
+    - cron: '0 0 * * *'
   push:
     branches:
       - main

README_zh.md

@@ -52,6 +52,9 @@
 name: Generate Contribution Gravity
 
 on:
+  workflow_dispatch:
+  schedule:
+    - cron: '0 0 * * *'
   push:
     branches:
       - main