manifest file also need to detect compression

fix https://github.com/chrislusf/seaweedfs/issues/1724#issuecomment-753585046

weed/storage/needle/needle_parse_upload.go

@@ -193,9 +193,9 @@ func parseMultipart(r *http.Request, sizeLimit int64, pu *ParsedUpload) (e error
 			mtype = contentType
 		}
 
+	}
 	pu.IsGzipped = part.Header.Get("Content-Encoding") == "gzip"
 	// pu.IsZstd = part.Header.Get("Content-Encoding") == "zstd"
-	}
 
 	return
 }