fix(git): add vendor in .gitignore

vendor/github.com/gin-gonic/gin/render/data.go

@@ -1,25 +0,0 @@
-// Copyright 2014 Manu Martinez-Almeida.  All rights reserved.
-// Use of this source code is governed by a MIT style
-// license that can be found in the LICENSE file.
-
-package render
-
-import "net/http"
-
-// Data contains ContentType and bytes data.
-type Data struct {
-	ContentType string
-	Data        []byte
-}
-
-// Render (Data) writes data with custom ContentType.
-func (r Data) Render(w http.ResponseWriter) (err error) {
-	r.WriteContentType(w)
-	_, err = w.Write(r.Data)
-	return
-}
-
-// WriteContentType (Data) writes custom ContentType.
-func (r Data) WriteContentType(w http.ResponseWriter) {
-	writeContentType(w, []string{r.ContentType})
-}