Fix champion proposal link.

meetings/2024/LDM-2024-02-21.md

@@ -39,7 +39,7 @@ The proposed specification is approved as proposed. Both open questions are reje
 
 ### `params` collections
 
-https://github.com/dotnet/csharplang/issues/7913  
+https://github.com/dotnet/csharplang/issues/7700
 
 In the second half of the meeting today, we went over the remainder of the `params` collections specification and open issues.