Tidied up 'Render Markdown' operation

src/core/config/Categories.json

@@ -358,7 +358,8 @@
             "BSON serialise",
             "BSON deserialise",
             "To MessagePack",
-            "From MessagePack"
+            "From MessagePack",
+            "Render Markdown"
         ]
     },
     {

src/core/operations/RenderMarkdown.mjs

@@ -20,8 +20,8 @@ class RenderMarkdown extends Operation {
         super();
 
         this.name = "Render Markdown";
-        this.module = "Default";
-        this.description = "Renders input Markdown as HTML.";
+        this.module = "Code";
+        this.description = "Renders input Markdown as HTML. HTML rendering is disabled to avoid XSS.";
         this.infoURL = "https://wikipedia.org/wiki/Markdown";
         this.inputType = "string";
         this.outputType = "html";