chore(deps): bump rdoc from 6.13.0 to 6.13.1 in the dependencies group

Bumps the dependencies group with 1 update: [rdoc](https://github.com/ruby/rdoc).


Updates `rdoc` from 6.13.0 to 6.13.1
- [Release notes](https://github.com/ruby/rdoc/releases)
- [Changelog](https://github.com/ruby/rdoc/blob/master/History.rdoc)
- [Commits](ruby/rdoc@v6.13.0...v6.13.1)

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

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

Author: dependabot[bot]

Gemfile

@@ -7,7 +7,7 @@ gem "RedCloth"
 # using a tag version here because 0.18.3 was not published by the author to encourage users to upgrade.
 # however we want to bump up to this version since this has a security patch
 gem "commonmarker", git: "https://github.com/gjtorikian/commonmarker.git", tag: "v0.18.3"
-gem "rdoc", "~> 6.13.0"
+gem "rdoc", "~> 6.13.1"
 gem "org-ruby", "0.9.12"
 gem "creole", "~>0.5.0"
 gem "wikicloth", "=0.8.3"

Gemfile.lock

@@ -79,7 +79,7 @@ GEM
       stringio
     racc (1.8.1)
     rake (13.2.1)
-    rdoc (6.13.0)
+    rdoc (6.13.1)
       psych (>= 4.0.0)
     redcarpet (3.6.1)
     rexml (3.4.1)
@@ -130,7 +130,7 @@ DEPENDENCIES
   nokogiri-diff (~> 0.3.0)
   org-ruby (= 0.9.12)
   rake
-  rdoc (~> 6.13.0)
+  rdoc (~> 6.13.1)
   redcarpet
   rexml
   sanitize (>= 4.6.3)