Bump @actions/github from 4.0.0 to 5.0.0

Bumps [@actions/github](https://github.com/actions/toolkit/tree/HEAD/packages/github) from 4.0.0 to 5.0.0.
- [Release notes](https://github.com/actions/toolkit/releases)
- [Changelog](https://github.com/actions/toolkit/blob/main/packages/github/RELEASES.md)
- [Commits](https://github.com/actions/toolkit/commits/HEAD/packages/github)

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

package.json

@@ -25,7 +25,7 @@
   "dependencies": {
     "@actions/core": "^1.2.7",
     "@actions/exec": "^1.0.4",
-    "@actions/github": "^4.0.0",
+    "@actions/github": "^5.0.0",
     "@types/jest": "^26.0.23",
     "@zeit/ncc": "^0.22.3",
     "fs": "0.0.1-security",