Added Git metadata cloning article link

Provides additional insight into different kinds of cloning, especially when you only care about repository metadata.
git · Jan 13, 2021 · a401338 · a401338
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diff --git a/rev_news/drafts/edition-71.md b/rev_news/drafts/edition-71.md
@@ -43,6 +43,8 @@ __Various__
 
 __Light reading__
 
+* [Git Metadata Cloning](https://www.alchemists.io/articles/git_metadata_cloning)- Learn about the
+  performance impacts of cloning repository metadata.
 
 __Git tools and sites__