Change staging branch name in workflow to dist-staging

because with `staging/dist`, Git errors if a branch name `staging` exists.

Author: Zwyx

.github/workflows/build-website.yml

@@ -40,7 +40,7 @@ jobs:
       - run: echo "APP_VERSION=$(jq -r '.version' package.json)" >> $GITHUB_ENV
         id: APP_VERSION
 
-      - run: echo "BRANCH=$(${{ github.event.base_ref == 'refs/heads/main' || github.ref == 'refs/heads/main' }} && echo "dist" || echo "staging/dist")" >> $GITHUB_ENV
+      - run: echo "BRANCH=$(${{ github.event.base_ref == 'refs/heads/main' || github.ref == 'refs/heads/main' }} && echo "dist" || echo "dist-staging")" >> $GITHUB_ENV
         id: BRANCH
 
       - run: echo "SENTRY_ENVIRONMENT=$([[ "${{ env.BRANCH }}" == "dist" ]] && echo "production" || echo "staging")" >> $GITHUB_ENV