chore(deps-dev): bump shelljs from 0.8.4 to 0.8.5 in /docs_app (#6773)

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](shelljs/shelljs@v0.8.4...v0.8.5)

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

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docs_app/package.json

@@ -120,7 +120,7 @@
     "remark-html": "^13.0.2",
     "rimraf": "^2.6.1",
     "semver": "^6.1.1",
-    "shelljs": "^0.8.3",
+    "shelljs": "^0.8.5",
     "svgo": "^1.3.2",
     "svgson": "^4.1.0",
     "swirly-parser": "^0.13.6",