Bump highlight.js from 10.5.0 to 10.6.0

Bumps [highlight.js](https://github.com/highlightjs/highlight.js) from 10.5.0 to 10.6.0.
- [Release notes](https://github.com/highlightjs/highlight.js/releases)
- [Changelog](https://github.com/highlightjs/highlight.js/blob/master/CHANGES.md)
- [Commits](https://github.com/highlightjs/highlight.js/compare/10.5.0...10.6.0)

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

package.json

@@ -70,7 +70,7 @@
     "annotator": "wallabag/annotator#master",
     "clipboard": "^2.0.4",
     "hammerjs": "^2.0.8",
-    "highlight.js": "^10.5.0",
+    "highlight.js": "^10.6.0",
     "icomoon-free-npm": "^0.0.0",
     "jquery": "^3.5.0",
     "jquery.cookie": "^1.4.1",