chore(deps): bump @primer/octicons from 19.8.0 to 19.15.1

Bumps [@primer/octicons](https://github.com/primer/octicons) from 19.8.0 to 19.15.1.
- [Release notes](https://github.com/primer/octicons/releases)
- [Changelog](https://github.com/primer/octicons/blob/main/CHANGELOG.md)
- [Commits](primer/octicons@v19.8.0...v19.15.1)

---
updated-dependencies:
- dependency-name: "@primer/octicons"
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

package.json

@@ -76,7 +76,7 @@
     "@octokit/request": "8.1.6",
     "@octokit/auth-app": "6.0.3",
     "@octokit/rest": "20.0.2",
-    "@primer/octicons": "19.8.0",
+    "@primer/octicons": "19.15.1",
     "app-root-path": "3.1.0",
     "applicationinsights": "2.9.2",
     "async-prompt": "1.0.1",