Bump github-username from 7.0.0 to 8.0.0 (#1467)

Bumps [github-username](https://github.com/sindresorhus/github-username) from 7.0.0 to 8.0.0.
- [Release notes](https://github.com/sindresorhus/github-username/releases)
- [Commits](sindresorhus/github-username@v7.0.0...v8.0.0)

---
updated-dependencies:
- dependency-name: github-username
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

package.json

@@ -57,7 +57,7 @@
     "chalk": "^5.3.0",
     "debug": "^4.1.1",
     "execa": "^8.0.1",
-    "github-username": "^7.0.0",
+    "github-username": "^8.0.0",
     "json-schema": "^0.4.0",
     "latest-version": "^9.0.0",
     "lodash-es": "^4.17.21",