* Remove `jekyll-default-layout` plugin
* Move docs/navigation-structure to docs/navigation
* Fix uses of line-nos in md files
* Update CHANGELOG.md
---------
Co-authored-by: Matt Wang <matt@matthewwang.me>
This PR fixed the typos in CHANGELOG and MIGRATION files
```pseudo
Simlar > Similar
avaialble > available
vulnerablities > vulnerabilities
concering > concerning
```
The migration guide is intended to help those using Just the Docs (as a theme or a remote theme) switch from v0.3.3 to v0.4.0.
Co-authored-by: Matt Wang <matt@matthewwang.me>