Use rails fork for rdoc gem

This allow us to actually get a working gem from github.

Author: rafaelfranca

Gemfile

@@ -61,7 +61,7 @@ end
 
 group :doc do
   gem "sdoc", git: "https://github.com/rails/sdoc.git", branch: "main"
-  gem "rdoc", github: "ruby/rdoc", branch: "master"
+  gem "rdoc", github: "rails/rdoc", branch: "master"
   gem "redcarpet", "~> 3.2.3", platforms: :ruby
   gem "w3c_validators", "~> 1.3.6"
   gem "rouge"

Gemfile.lock

@@ -14,6 +14,14 @@ GIT
   specs:
     httpclient (2.8.3)
 
+GIT
+  remote: https://github.com/rails/rdoc.git
+  revision: 7472b691920b65b9e0f9f4d1bd6ed757c71d5c70
+  branch: master
+  specs:
+    rdoc (6.6.3.1)
+      psych (>= 4.0.0)
+
 GIT
   remote: https://github.com/rails/sdoc.git
   revision: e9bb867eba81f48c402a129e688e810ec1fa387c
@@ -24,14 +32,6 @@ GIT
       rdoc (>= 5.0)
       rouge
 
-GIT
-  remote: https://github.com/ruby/rdoc.git
-  revision: 5c7ea6fa15f403b1c84f5b823716f75595c97d8c
-  branch: master
-  specs:
-    rdoc (6.6.3.1)
-      psych (>= 4.0.0)
-
 PATH
   remote: .
   specs: