SUBMARINE-877. Replace the dtds url in checkstyle.xml with new url.

### What is this PR for?
Replace out-of-date url in checkstyle.xml
reference:
checkstyle/checkstyle#6478

### What type of PR is it?
Bug Fix

### Todos

### What is the Jira issue?
https://issues.apache.org/jira/browse/SUBMARINE-877

### How should this be tested?

### Screenshots (if appropriate)

### Questions:
* Do the license files need updating? No
* Are there breaking changes for older versions? No
* Does this need new documentation? No

Author: jeff-901 <b07901052@ntu.edu.com>

Signed-off-by: byronhsu <byronhsu@apache.org>

Closes #618 from jeff-901/SUBMARINE-877 and squashes the following commits:

78ba6d4 [jeff-901] update url

dev-support/maven-config/checkstyle.xml

@@ -16,7 +16,7 @@ limitations under the License.
 
 <!DOCTYPE module PUBLIC
   "-//Puppy Crawl//DTD Check Configuration 1.3//EN"
-  "http://www.puppycrawl.com/dtds/configuration_1_3.dtd">
+  "https://checkstyle.org/dtds/configuration_1_3.dtd">
 
 <!-- This is a checkstyle configuration file. For descriptions of what the 
 	following rules do, please see the checkstyle configuration page at http://checkstyle.sourceforge.net/config.html -->