Bump core-js from 3.8.2 to 3.8.3

Bumps [core-js](https://github.com/zloirock/core-js) from 3.8.2 to 3.8.3.
- [Release notes](https://github.com/zloirock/core-js/releases)
- [Changelog](https://github.com/zloirock/core-js/blob/master/CHANGELOG.md)
- [Commits](zloirock/core-js@v3.8.2...v3.8.3)

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

Author: dependabot[bot]

js/notifications-main.js

@@ -25,7 +25,7 @@
 		"@nextcloud/moment": "^1.1.1",
 		"@nextcloud/router": "^1.2.0",
 		"@nextcloud/vue": "^3.5.4",
-		"core-js": "^3.8.2",
+		"core-js": "^3.8.3",
 		"regenerator-runtime": "^0.13.7",
 		"vue": "^2.6.12",
 		"vue-tooltip": "^0.1.0"