fixed github action triggers

.github/workflows/build.yml

@@ -1,4 +1,6 @@
-on: push
+on:
+  push:
+  workflow_dispatch:
 jobs:
   lint:
     runs-on: ubuntu-latest

.github/workflows/update.yml

@@ -1,5 +1,7 @@
 on:
   push:
+    branches:
+      - master
   workflow_dispatch:
   schedule:
     - cron: '30 0 * * *'