Use StringComparer.OrdinalIgnoreCase.GetHashCode

Author: ajcvickers

src/EFCore/ChangeTracking/CaseInsensitiveValueComparer.cs

@@ -14,7 +14,7 @@ public class CaseInsensitiveValueComparer : ValueComparer<string?>
     public CaseInsensitiveValueComparer()
         : base(
             (l, r) => string.Equals(l, r, StringComparison.OrdinalIgnoreCase),
-            v => v == null ? 0 : v.ToUpper().GetHashCode())
+            v => v == null ? 0 : StringComparer.OrdinalIgnoreCase.GetHashCode(v))
     {
     }
 }