Bump shelljs from 0.8.4 to 0.8.5 in /website-generator

Bumps [shelljs](https://github.com/shelljs/shelljs) from 0.8.4 to 0.8.5.
- [Release notes](https://github.com/shelljs/shelljs/releases)
- [Changelog](https://github.com/shelljs/shelljs/blob/master/CHANGELOG.md)
- [Commits](https://github.com/shelljs/shelljs/compare/v0.8.4...v0.8.5)

---
updated-dependencies:
- dependency-name: shelljs
  dependency-type: direct:production
...

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

website-generator/package.json

@@ -30,7 +30,7 @@
     "path": "^0.12.7",
     "readline": "^1.3.0",
     "regex": "^0.1.1",
-    "shelljs": "^0.8.4",
+    "shelljs": "^0.8.5",
     "sleep": "^6.1.0"
   }
 }