ci(deploy): Update default branch references from master to main

- Update Attach custom domain step condition to use main branch
- Update Create DNS record step condition to use main branch
- Align workflow with modern Git default branch naming conventions

.gitea/workflows/deploy.yml

@@ -27,8 +27,8 @@ jobs:
           CLOUDFLARE_API_TOKEN: ${{ secrets.CF_API_TOKEN }}
           CLOUDFLARE_ACCOUNT_ID: ${{ secrets.CF_ACCOUNT_ID }}
 
-      - name: Attach custom domain (master only)
-        if: github.ref == 'refs/heads/master'
+      - name: Attach custom domain (main only)
+        if: github.ref == 'refs/heads/main'
         run: |
           echo "Adding domain ${CLOUDFLARE_CUSTOM_DOMAIN} to project ${CLOUDFLARE_PROJECT_NAME}..."
           BODY=$(printf '{"name": "%s"}' "${CLOUDFLARE_CUSTOM_DOMAIN}")
@@ -49,7 +49,7 @@ jobs:
           CLOUDFLARE_ACCOUNT_ID: ${{ secrets.CF_ACCOUNT_ID }}
 
       - name: Create DNS record for custom domain
-        if: github.ref == 'refs/heads/master'
+        if: github.ref == 'refs/heads/main'
         run: |
           # Extract root zone from the custom domain (e.g. product-example.sloanops.com -> sloanops.com)
           ROOT_ZONE="${CLOUDFLARE_CUSTOM_DOMAIN#*.}"