build(deps-dev): update @semantic-release/github requirement

Updates the requirements on [@semantic-release/github](https://github.com/semantic-release/github) to permit the latest version.
- [Release notes](https://github.com/semantic-release/github/releases)
- [Commits](https://github.com/semantic-release/github/commits/v5.2.1)

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

package.json

@@ -51,7 +51,7 @@
     "@semantic-release/commit-analyzer": "6.1.0",
     "@semantic-release/exec": "3.3.0",
     "@semantic-release/git": "7.0.5",
-    "@semantic-release/github": "5.2.0",
+    "@semantic-release/github": "5.2.1",
     "conventional-changelog": "2.0.3",
     "semantic-release": "^15.9.17",
     "travis-deploy-once": "^5.0.9"