Fix typo

Author: junichi11

src/main/java/com/junichi11/netbeans/modules/github/issues/issue/ui/GitHubIssuePanel.java

@@ -1563,7 +1563,7 @@ private void duplicate() {
 
         @NbBundle.Messages({
             "# {0} - name",
-            "ManageTemplateButtonListener.remove.message=Did you really want to remove {0}?"
+            "ManageTemplateButtonListener.remove.message=Do you really want to remove {0}?"
         })
         private void remove() {
             String selectedTemplateName = manageTemplatesPanel.getSelectedTemplateName();