[MISC] (deps): Bump just-the-docs from 0.2.9 to 0.3.0 in /docs (#1158)

Bumps [just-the-docs](https://github.com/pmarsceill/just-the-docs) from 0.2.9 to 0.3.0.
- [Release notes](https://github.com/pmarsceill/just-the-docs/releases)
- [Commits](just-the-docs/just-the-docs@v0.2.9...v0.3.0)

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

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

docs/Gemfile.lock

@@ -191,8 +191,8 @@ GEM
       gemoji (~> 3.0)
       html-pipeline (~> 2.2)
       jekyll (>= 3.0, < 5.0)
-    just-the-docs (0.2.9)
-      jekyll (>= 3.8.5, < 4.1.0)
+    just-the-docs (0.3.0)
+      jekyll (>= 3.8.5)
       jekyll-seo-tag (~> 2.0)
       rake (>= 12.3.1, < 13.1.0)
     kramdown (1.17.0)