change contact user agent

Author: andy-jdl

core/routes/routes.go

@@ -18,7 +18,7 @@ func RegisterRoutes(r *gin.Engine, cfg *config.Config) {
 
 	transport := &HeaderTransport{
 		headers: map[string]string{
-			"User-Agent": "OpenGallery/1.0 (jdlc.andy@gmail.com)",
+			"User-Agent": "OpenGallery/1.0 (Open Gallery Extension)",
 			"Accept":     "application/json",
 		},
 		base: http.DefaultTransport,