WRITING-26459 Fix link in migration guide (#1792)

Author: blink1073

docs/migration-2.0.md

@@ -423,8 +423,12 @@ Dropping an index replies with a superset of the following message: `{nIndexesWa
 
 #### ListSpecifications
 
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 Updated to return a slice of structs instead of a slice of pointers. See the [database analogue](#ListCollectionSpecifications) for migration guide.
 
+<!-- markdown-link-check-enable -->
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 ### NewClient
 
 `NewClient` has been removed, use the `Connect` function in the `mongo` package instead.