chore(deps): update dependency rollup to v4.21.0 (tauri-apps#1672)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

package.json

@@ -20,7 +20,7 @@
     "eslint-config-prettier": "9.1.0",
     "eslint-plugin-security": "3.0.1",
     "prettier": "3.3.3",
-    "rollup": "4.20.0",
+    "rollup": "4.21.0",
     "tslib": "2.6.3",
     "typescript": "5.5.4",
     "typescript-eslint": "8.1.0"