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

@@ -132,7 +132,7 @@ GEM
     date (3.4.1)
     deep_merge (1.2.2)
     drb (2.2.3)
-    erb (5.0.2)
+    erb (5.0.3)
     erubi (1.13.1)
     execjs (2.10.0)
     ffi (1.17.2-aarch64-linux-gnu)
@@ -289,9 +289,10 @@ GEM
     rb-fsevent (0.11.2)
     rb-inotify (0.11.1)
       ffi (~> 1.0)
-    rdoc (6.14.2)
+    rdoc (6.15.0)
       erb
       psych (>= 4.0.0)
+      tsort
     regexp_parser (2.11.3)
     reline (0.6.2)
       io-console (~> 0.5)
@@ -376,6 +377,7 @@ GEM
     thor (1.4.0)
     tilt (2.6.0)
     timeout (0.4.3)
+    tsort (0.2.0)
     turbo-rails (2.0.16)
       actionpack (>= 7.1.0)
       railties (>= 7.1.0)