Remove "next" branch from the docs

Author: alansemenov

.github/workflows/enonic-docgen.yml

@@ -4,8 +4,7 @@ on:
   push:
     branches:
       - "master"
-      - "5.2"
-      - "5.3-docs"
+      - "5.3"
     paths:
       - 'docs/**'
   workflow_dispatch:

docs/versions.json

@@ -14,12 +14,8 @@
     },
     {
       "label": "stable",
-      "checkout": "5.2",
+      "checkout": "5.3",
       "latest": true
-    },
-    {
-      "label": "next",
-      "checkout": "5.3-docs"
     }
   ]
 }