Fix metadata

merton_planning_formatter.gemspec

@@ -6,7 +6,7 @@ Gem::Specification.new do |spec|
   spec.authors       = ["Adrian Short"]
   spec.email         = ["adrian@adrianshort.org"]
 
-  spec.summary       = %q{Formats planning application descriptions/proposals nicely.}
+  spec.summary       = %q{Format Merton Council planning application descriptions/proposals nicely.}
   # spec.description   = %q{TODO: Write a longer description or delete this line.}
   spec.homepage      = "https://github.com/adrianshort/merton_planning_formatter"
   spec.required_ruby_version = Gem::Requirement.new(">= 2.3.0")
@@ -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/adrianshort/merton_planning_formatter/CHANGELOG.md"
+  spec.metadata["changelog_uri"] = "https://github.com/adrianshort/merton_planning_formatter/blob/master/CHANGELOG.md"
 
   # Specify which files should be added to the gem when it is released.
   # The `git ls-files -z` loads the files in the RubyGem that have been added into git.