Bump core-js from 3.8.0 to 3.8.1

Bumps [core-js](https://github.com/zloirock/core-js) from 3.8.0 to 3.8.1.
- [Release notes](https://github.com/zloirock/core-js/releases)
- [Changelog](https://github.com/zloirock/core-js/blob/master/CHANGELOG.md)
- [Commits](zloirock/core-js@v3.8.0...v3.8.1)

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

package.json

@@ -47,7 +47,7 @@
     "bootstrap": "^4.5.3",
     "camelcase": "^6.2.0",
     "clipboard": "^2.0.6",
-    "core-js": "^3.8.0",
+    "core-js": "^3.8.1",
     "css-vars-ponyfill": "^2.4.2",
     "davclient.js": "git+https://github.com/owncloud/davclient.js.git#0.2.1",
     "debounce": "^1.2.0",