Bump rdoc from 6.7.0 to 6.10.0

Bumps [rdoc](https://github.com/ruby/rdoc) from 6.7.0 to 6.10.0.
- [Release notes](https://github.com/ruby/rdoc/releases)
- [Changelog](https://github.com/ruby/rdoc/blob/master/History.rdoc)
- [Commits](ruby/rdoc@v6.7.0...v6.10.0)

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

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

Gemfile.lock

@@ -216,7 +216,8 @@ GEM
     parser (3.3.5.0)
       ast (~> 2.4.1)
       racc
-    psych (5.1.2)
+    psych (5.2.2)
+      date
       stringio
     public_suffix (5.0.4)
     puma (6.4.3)
@@ -267,7 +268,7 @@ GEM
     rb-fsevent (0.11.2)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
-    rdoc (6.7.0)
+    rdoc (6.10.0)
       psych (>= 4.0.0)
     regexp_parser (2.9.2)
     reline (0.5.10)
@@ -340,7 +341,7 @@ GEM
       rubocop-performance (~> 1.22.0)
     stimulus-rails (1.3.4)
       railties (>= 6.0.0)
-    stringio (3.1.1)
+    stringio (3.1.2)
     temple (0.10.3)
     thor (1.3.2)
     tilt (2.3.0)