Bump primer-core from 6.0.0 to 6.8.0

Bumps [primer-core](https://github.com/primer/primer) from 6.0.0 to 6.8.0.
- [Release notes](https://github.com/primer/primer/releases)
- [Changelog](https://github.com/primer/primer/blob/master/CHANGELOG.md)
- [Commits](https://github.com/primer/primer/commits)

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot-support

package-lock.json

@@ -6,7 +6,7 @@
     "postinstall": "cd test && npm install"
   },
   "dependencies": {
-    "primer-core": "6.0.0",
+    "primer-core": "6.8.0",
     "primer-marketing": "6.2.0"
   }
 }