Update src/Microsoft.OpenApi/Extensions/StringExtensions.cs

Co-authored-by: DeVere Dyett <[email protected]>

Author: irvinesunday

src/Microsoft.OpenApi/Extensions/StringExtensions.cs

@@ -46,7 +46,7 @@ public static T GetEnumFromDisplayName<T>(this string displayName)
         /// <returns>String value with each word capitalized and concatenated.</returns>
         public static string ToPascalCase(this string input)
             => string.IsNullOrEmpty(input) ? input : string.Join(null, input.Split(new char[] { '-' }, StringSplitOptions.RemoveEmptyEntries)
-                                                                            .Select(s => ToFirstCharacterUpperCase(s)));
+                                                                            .Select(ToFirstCharacterUpperCase));
         /// <summary>
         /// Capitalizes the first letter of an input string.
         /// </summary>