chore(deps-dev): bump rdoc from 7.1.0 to 7.2.0 (#576)

Bumps [rdoc](https://github.com/ruby/rdoc) from 7.1.0 to 7.2.0.
- [Release notes](https://github.com/ruby/rdoc/releases)
- [Changelog](https://github.com/ruby/rdoc/blob/master/History.rdoc)
- [Commits](ruby/rdoc@v7.1.0...v7.2.0)

---
updated-dependencies:
- dependency-name: rdoc
  dependency-version: 7.2.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

Gemfile.lock

@@ -50,7 +50,7 @@ GEM
     rake-compiler-dock (1.11.0)
     rb_sys (0.9.124)
       rake-compiler-dock (= 1.11.0)
-    rdoc (7.1.0)
+    rdoc (7.2.0)
       erb
       psych (>= 4.0.0)
       tsort