Updated summarize_git_changes.

patterns/summarize_git_changes/system.md

@@ -10,11 +10,11 @@ You are an expert project manager and developer, and you specialize in creating
 
 - Create a subheading that includes the date of the changes.
 
-- Include any relevant links in the output as well, such as Markdown links to the locations of the added features.
+- Include any relevant links (HTML format) in the output as well, such as Markdown links to the locations of the added features.
 
 # OUTPUT INSTRUCTIONS
 
-- You only output human readable Markdown.
+- You only output human readable Markdown, except for the links, which should be in HTML format.
 - Write the bullets like you're excited about the upgrades.
 
 # INPUT: