Bump rdoc from 6.9.0 to 6.9.1

Bumps [rdoc](https://github.com/ruby/rdoc) from 6.9.0 to 6.9.1.
- [Release notes](https://github.com/ruby/rdoc/releases)
- [Changelog](https://github.com/ruby/rdoc/blob/master/History.rdoc)
- [Commits](ruby/rdoc@v6.9.0...v6.9.1)

---
updated-dependencies:
- dependency-name: rdoc
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

Gemfile.lock

@@ -13,7 +13,7 @@ GEM
   remote: https://rubygems.org/
   specs:
     abbrev (0.1.2)
-    activesupport (8.0.1)
+    activesupport (7.2.2.1)
       base64
       benchmark (>= 0.3)
       bigdecimal
@@ -25,7 +25,6 @@ GEM
       minitest (>= 5.1)
       securerandom (>= 0.3)
       tzinfo (~> 2.0, >= 2.0.5)
-      uri (>= 0.13.1)
     addressable (2.8.7)
       public_suffix (>= 2.0.2, < 7.0)
     ast (2.4.2)
@@ -85,7 +84,7 @@ GEM
     rb-fsevent (0.11.2)
     rb-inotify (0.11.1)
       ffi (~> 1.0)
-    rdoc (6.9.0)
+    rdoc (6.9.1)
       psych (>= 4.0.0)
     regexp_parser (2.9.3)
     rspec (3.13.0)