Connect to HTTPS PlantUML URL in default

CHANGES.md

@@ -3,6 +3,7 @@
 ## 3.5.12-RC
 
 * Improvement: Use Elasticsearch Alias
+* Improvement: Connect to HTTPS PlantUML URL in default
 * Fix: Global Notification doesn't work after updating Webhook URL
 * Fix: User Trigger Notification is not be sent when channel is not specified
 

src/client/js/util/markdown-it/plantuml.js

@@ -7,7 +7,7 @@ export default class PlantUMLConfigurer {
     this.crowi = crowi;
     const config = crowi.getConfig();
 
-    this.serverUrl = config.env.PLANTUML_URI || 'http://plantuml.com/plantuml';
+    this.serverUrl = config.env.PLANTUML_URI || 'https://plantuml.com/plantuml';
 
     this.generateSource = this.generateSource.bind(this);
   }