Bump core-js from 3.9.0 to 3.9.1

Bumps [core-js](https://github.com/zloirock/core-js/tree/HEAD/packages/core-js) from 3.9.0 to 3.9.1.
- [Release notes](https://github.com/zloirock/core-js/releases)
- [Changelog](https://github.com/zloirock/core-js/blob/master/CHANGELOG.md)
- [Commits](https://github.com/zloirock/core-js/commits/v3.9.1/packages/core-js)

Signed-off-by: dependabot[bot] <support@github.com>

package.json

@@ -56,7 +56,7 @@
     "@fontsource/noto-sans-sc": "^4.2.1",
     "blurhash": "^1.1.3",
     "classlist.js": "https://github.com/eligrey/classList.js/archive/1.2.20180112.tar.gz",
-    "core-js": "^3.9.0",
+    "core-js": "^3.9.1",
     "date-fns": "^2.17.0",
     "epubjs": "^0.3.85",
     "fast-text-encoding": "^1.0.3",