build(deps): bump just-the-docs from 0.1.6 to 0.4.0 in /docs (#3179)

Bumps [just-the-docs](https://github.com/just-the-docs/just-the-docs) from 0.1.6 to 0.4.0.
- [Release notes](https://github.com/just-the-docs/just-the-docs/releases)
- [Changelog](https://github.com/just-the-docs/just-the-docs/blob/main/CHANGELOG.md)
- [Commits](just-the-docs/just-the-docs@v0.1.6...v0.4.0)

---
updated-dependencies:
- dependency-name: just-the-docs
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

docs/Gemfile.lock

@@ -196,9 +196,10 @@ GEM
       gemoji (~> 3.0)
       html-pipeline (~> 2.2)
       jekyll (>= 3.0, < 5.0)
-    just-the-docs (0.1.6)
-      jekyll (~> 3.3)
-      rake (~> 10.0)
+    just-the-docs (0.4.0)
+      jekyll (>= 3.8.5)
+      jekyll-seo-tag (>= 2.0)
+      rake (>= 12.3.1)
     kramdown (2.3.2)
       rexml
     kramdown-parser-gfm (1.1.0)
@@ -224,7 +225,7 @@ GEM
       forwardable-extended (~> 2.6)
     public_suffix (4.0.7)
     racc (1.6.2)
-    rake (10.5.0)
+    rake (13.0.6)
     rb-fsevent (0.11.2)
     rb-inotify (0.10.1)
       ffi (~> 1.0)