Bump rdoc from 6.14.2 to 6.15.0

Bumps [rdoc](https://github.com/ruby/rdoc) from 6.14.2 to 6.15.0.
- [Release notes](https://github.com/ruby/rdoc/releases)
- [Changelog](https://github.com/ruby/rdoc/blob/master/History.rdoc)
- [Commits](ruby/rdoc@v6.14.2...v6.15.0)

---
updated-dependencies:
- dependency-name: rdoc
  dependency-version: 6.15.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

Gemfile.lock

@@ -298,9 +298,10 @@ GEM
     rainbow (3.1.1)
     rake (13.3.0)
     rdiscount (2.2.7.3)
-    rdoc (6.14.2)
+    rdoc (6.15.0)
       erb
       psych (>= 4.0.0)
+      tsort
     redcarpet (3.6.1)
     regexp_parser (2.10.0)
     reline (0.6.2)
@@ -393,6 +394,7 @@ GEM
     thruster (0.1.15-arm64-darwin)
     thruster (0.1.15-x86_64-linux)
     timeout (0.4.3)
+    tsort (0.2.0)
     turbo-rails (2.0.17)
       actionpack (>= 7.1.0)
       railties (>= 7.1.0)