[MM-42335] Fix in RenderMobileError (#21536)

* tools updates

* Revert "tools updates"

This reverts commit 6293297b55803c5a263e200ebd80192899666ae9.

* fix

Co-authored-by: Benjamin Cooke <benjamincooke@Benjamins-MacBook-Pro.local>
Co-authored-by: Benjamin Cooke <benjamincooke@Benjamins-MBP.ht.home>
Co-authored-by: Benjamin Cooke <benjamincooke@Benjamins-MBP.fritz.box>
Co-authored-by: Benjamin Cooke <benjamincooke@Benjamins-MacBook-Pro.fritz.box>

utils/api.go

@@ -101,7 +101,7 @@ func RenderMobileAuthComplete(w http.ResponseWriter, redirectURL string) {
 }
 
 func RenderMobileError(config *model.Config, w http.ResponseWriter, err *model.AppError, redirectURL string) {
-	var link = redirectURL
+	var link = template.HTMLEscapeString(redirectURL)
 	var invalidSchemes = map[string]bool{
 		"data":       true,
 		"javascript": true,