Update default plugin publish target branch

Author: jjw24

.github/workflows/default_plugins.yml

@@ -2,7 +2,7 @@ name: Publish Default Plugins
 
 on:
   push:
-    branches: ['dev']
+    branches: ['master']
     paths: ['Plugins/**']
   workflow_dispatch:
 
@@ -369,4 +369,4 @@ jobs:
           tag_name: "v${{steps.updated-version-windowssettings.outputs.prop}}"
           body: Visit Flow's [release notes](https://github.com/Flow-Launcher/Flow.Launcher/releases) for changes.
         env:
-          GITHUB_TOKEN: ${{ secrets.PUBLISH_PLUGINS }}
+          GITHUB_TOKEN: ${{ secrets.PUBLISH_PLUGINS }}