Bump addressable from 2.8.7 to 2.9.0 in /docs

Bumps [addressable](https://github.com/sporkmonger/addressable) from 2.8.7 to 2.9.0.
- [Changelog](https://github.com/sporkmonger/addressable/blob/main/CHANGELOG.md)
- [Commits](sporkmonger/addressable@addressable-2.8.7...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

@@ -7,8 +7,8 @@ GEM
       minitest (>= 5.1)
       tzinfo (~> 2.0)
       zeitwerk (~> 2.3)
-    addressable (2.8.7)
-      public_suffix (>= 2.0.2, < 7.0)
+    addressable (2.9.0)
+      public_suffix (>= 2.0.2, < 8.0)
     base64 (0.2.0)
     coffee-script (2.4.1)
       coffee-script-source