Actions: Use main branch (#818)

Author: ryonakano

.github/workflows/release.yml

@@ -19,7 +19,7 @@ jobs:
          uses: actions/checkout@v4
 
        - name: Release
-         uses: elementary/actions/release@master
+         uses: elementary/actions/release@main
          env:
            GIT_USER_TOKEN: "${{ secrets.GIT_USER_TOKEN }}"
            GIT_USER_NAME: "elementaryBot"