fix CreateIssueCommentOption reference (#4239)

* fixes a warning remaining from #4010 and #4220

public/swagger.v1.json

@@ -2208,7 +2208,7 @@
             "name": "body",
             "in": "body",
             "schema": {
-              "$ref": "#/definitions/CreateIssueOption"
+              "$ref": "#/definitions/CreateIssueCommentOption"
             }
           }
         ],

routers/api/v1/repo/issue_comment.go

@@ -147,7 +147,7 @@ func CreateIssueComment(ctx *context.APIContext, form api.CreateIssueCommentOpti
 	// - name: body
 	//   in: body
 	//   schema:
-	//     "$ref": "#/definitions/CreateIssueOption"
+	//     "$ref": "#/definitions/CreateIssueCommentOption"
 	// responses:
 	//   "201":
 	//     "$ref": "#/responses/Comment"