ci: update workflow triggers from master to main

Author: randy3k

.github/workflows/main.yml

@@ -2,10 +2,10 @@ name: main
 on:
   push:
     branches:
-      - master
+      - main
   pull_request:
     branches:
-      - master
+      - main
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}

.github/workflows/pre-release.yml

@@ -4,7 +4,7 @@ name: pre-release
 
 on:
   push:
-    branches: ["master"]
+    branches: ["main"]
 
 env:
   FILE_OUT: r-latest.vsix
@@ -53,5 +53,5 @@ jobs:
           git push origin latest --force
           gh release create latest artifacts/${{ env.VSIX_FILE }}/${{ env.VSIX_FILE }} \
             --title "Development Build" \
-            --notes "Contains the vsix-file from the latest push to master." \
+            --notes "Contains the vsix-file from the latest push to main." \
             --prerelease