Fix typo in HttpResponseWritingExtensions (#7413)

Fix typo WriteMutliSegmentEncoded => WriteMultiSegmentEncoded

Author: jo-ninja

src/Http/Http.Abstractions/src/Extensions/HttpResponseWritingExtensions.cs

@@ -105,11 +105,11 @@ private static void Write(this HttpResponse response, string text, Encoding enco
             }
             else
             {
-                WriteMutliSegmentEncoded(pipeWriter, text, encoding, destination, encodedLength);
+                WriteMultiSegmentEncoded(pipeWriter, text, encoding, destination, encodedLength);
             }
         }
 
-        private static void WriteMutliSegmentEncoded(PipeWriter writer, string text, Encoding encoding, Span<byte> destination, int encodedLength)
+        private static void WriteMultiSegmentEncoded(PipeWriter writer, string text, Encoding encoding, Span<byte> destination, int encodedLength)
         {
             var encoder = encoding.GetEncoder();
             var source = text.AsSpan();