gnu: ruby-simplecov-html: Update to 0.12.3.

* gnu/packages/ruby.scm (ruby-simplecov-html): Update to 0.12.3.
[home-page]: Update URL.

gnu/packages/ruby.scm

@@ -3365,13 +3365,13 @@ Ruby Gems.")
 (define-public ruby-simplecov-html
   (package
     (name "ruby-simplecov-html")
-    (version "0.10.2")
+    (version "0.12.3")
     (source (origin
               (method url-fetch)
               (uri (rubygems-uri "simplecov-html" version))
               (sha256
                (base32
-                "1lihraa4rgxk8wbfl77fy9sf0ypk31iivly8vl3w04srd7i0clzn"))))
+                "0yx01bxa8pbf9ip4hagqkp5m0mqfnwnw2xk8kjraiywz4lrss6jb"))))
     (build-system ruby-build-system)
     (arguments `(#:tests? #f)) ; there are no tests
     (native-inputs
@@ -3379,7 +3379,7 @@ Ruby Gems.")
     (synopsis "Default HTML formatter for SimpleCov code coverage tool")
     (description "This package provides the default HTML formatter for
 the SimpleCov code coverage tool for Ruby version 1.9 and above.")
-    (home-page "https://github.com/colszowka/simplecov-html")
+    (home-page "https://github.com/simplecov-ruby/simplecov-html")
     (license license:expat)))
 
 (define-public ruby-simplecov-json-formatter