Bump addressable from 2.8.0 to 2.9.0 in /docs

Bumps [addressable](https://github.com/sporkmonger/addressable) from 2.8.0 to 2.9.0.
- [Changelog](https://github.com/sporkmonger/addressable/blob/main/CHANGELOG.md)
- [Commits](sporkmonger/addressable@addressable-2.8.0...addressable-2.9.0)

---
updated-dependencies:
- dependency-name: addressable
  dependency-version: 2.9.0
  dependency-type: indirect
...

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

Author: dependabot[bot]

docs/Gemfile.lock

@@ -1,8 +1,8 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    addressable (2.8.0)
-      public_suffix (>= 2.0.2, < 5.0)
+    addressable (2.9.0)
+      public_suffix (>= 2.0.2, < 8.0)
     colorator (1.1.0)
     concurrent-ruby (1.1.5)
     em-websocket (0.5.1)
@@ -48,7 +48,7 @@ GEM
       jekyll-seo-tag (~> 2.1)
     pathutil (0.16.2)
       forwardable-extended (~> 2.6)
-    public_suffix (4.0.6)
+    public_suffix (7.0.5)
     rb-fsevent (0.10.3)
     rb-inotify (0.10.0)
       ffi (~> 1.0)