Update CHANGELOG uri in gemspec

Author: julik

gouda.gemspec

@@ -14,7 +14,7 @@ Gem::Specification.new do |spec|
 
   spec.metadata["homepage_uri"] = spec.homepage
   spec.metadata["source_code_uri"] = spec.homepage
-  spec.metadata["changelog_uri"] = "https://github.com/cheddar-me/gouda/CHANGELOG.md"
+  spec.metadata["changelog_uri"] = "https://github.com/cheddar-me/gouda/blob/main/CHANGELOG.md"
 
   spec.files = Dir.chdir(File.expand_path(__dir__)) do
     `git ls-files -z`.split("\x0")