fix: update branch references from 'main' to 'master' in workflows

Author: mbolli

.github/workflows/gh-pages.yml

@@ -3,7 +3,7 @@ name: Deploy to GitHub Pages
 on:
   push:
     branches:
-      - main
+      - master
 
 permissions:
   contents: read

.github/workflows/release.yml

@@ -3,7 +3,7 @@ name: Release
 on:
   push:
     branches:
-      - main
+      - master
 
 permissions:
   contents: write
@@ -65,7 +65,7 @@ jobs:
 
       - name: Push changes
         run: |
-          git push origin main --follow-tags
+          git push origin master --follow-tags
 
       - name: Create GitHub Release
         uses: softprops/action-gh-release@v2