Bump just-the-docs from 0.7.0 to 0.8.1

Bumps [just-the-docs](https://github.com/just-the-docs/just-the-docs) from 0.7.0 to 0.8.1.
- [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@v0.7.0...v0.8.1)

---
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>

Gemfile.lock

@@ -21,7 +21,7 @@ GEM
     coffee-script-source (1.11.1)
     colorator (1.1.0)
     commonmarker (0.23.10)
-    concurrent-ruby (1.2.2)
+    concurrent-ruby (1.2.3)
     connection_pool (2.4.1)
     dnsruby (1.70.0)
       simpleidn (~> 0.2.1)
@@ -97,7 +97,7 @@ GEM
       activesupport (>= 2)
       nokogiri (>= 1.4)
     http_parser.rb (0.8.0)
-    i18n (1.14.1)
+    i18n (1.14.4)
       concurrent-ruby (~> 1.0)
     jekyll (3.9.3)
       addressable (~> 2.4)
@@ -207,7 +207,7 @@ GEM
       gemoji (~> 3.0)
       html-pipeline (~> 2.2)
       jekyll (>= 3.0, < 5.0)
-    just-the-docs (0.7.0)
+    just-the-docs (0.8.1)
       jekyll (>= 3.8.5)
       jekyll-include-cache
       jekyll-seo-tag (>= 2.0)
@@ -217,7 +217,7 @@ GEM
     kramdown-parser-gfm (1.1.0)
       kramdown (~> 2.0)
     liquid (4.0.4)
-    listen (3.8.0)
+    listen (3.9.0)
       rb-fsevent (~> 0.10, >= 0.10.3)
       rb-inotify (~> 0.9, >= 0.9.10)
     mercenary (0.3.6)