Fix typo in XML comment (#28694)

src/Razor/Razor.Runtime/src/Hosting/RazorCompiledItemAttribute.cs

@@ -47,7 +47,7 @@ namespace Microsoft.AspNetCore.Razor.Hosting
 
         /// <summary>
         /// Gets the identifier associated with the compiled item. The identifier is used programmatically to locate
-        /// a specific item of a specific kind and should be uniqure within the assembly.
+        /// a specific item of a specific kind and should be unique within the assembly.
         /// </summary>
         public string Identifier { get; }