Fix the tag format in the repository URL - I thought npm version didn't include the leading v but it does

templates/default-layout.hamlet

@@ -34,4 +34,4 @@
     $with Package { packageName = n, packageVersion = v, packageRepository = r } <- package
         <p>
             powered by #
-            <a href="#{repositoryUrl r}/tree/#{v}">#{n} #{v}
+            <a href="#{repositoryUrl r}/tree/v#{v}">#{n} #{v}