fix sidebar

Author: LordSimal

toc_en.json

@@ -391,28 +391,12 @@
               "link": "/appendices/migration-guides"
             },
             {
-              "text": "5.0 Migration Guide",
-              "link": "/appendices/5-0-migration-guide"
+              "text": "6.0 Migration Guide",
+              "link": "/appendices/6-0-migration-guide"
             },
             {
-              "text": "5.0 Upgrade Guide",
-              "link": "/appendices/5-0-upgrade-guide"
-            },
-            {
-              "text": "5.1 Migration Guide",
-              "link": "/appendices/5-1-migration-guide"
-            },
-            {
-              "text": "5.2 Migration Guide",
-              "link": "/appendices/5-2-migration-guide"
-            },
-            {
-              "text": "5.3 Migration Guide",
-              "link": "/appendices/5-3-migration-guide"
-            },
-            {
-              "text": "5.4 Migration Guide",
-              "link": "/appendices/5-4-migration-guide"
+              "text": "6.0 Upgrade Guide",
+              "link": "/appendices/6-0-upgrade-guide"
             },
             {
               "text": "CakePHP Development Process",