Tutorial: rename korap to devlopment also internally

This has to be done in a separate second step because it's pretty error-prone.

Follow up to I05dbd6d938324151e5eb1cbe15a66790da13c63c

Change-Id: Ib0b7e546f2a9dd5c321516774cf95bab74c42962
diff --git a/templates/doc/navigation.json b/templates/doc/navigation.json
index a904c16..b53bcf6 100644
--- a/templates/doc/navigation.json
+++ b/templates/doc/navigation.json
@@ -104,7 +104,7 @@
   },
   {
     "title": "Development",
-    "id": "korap",
+    "id": "development",
     "items": [
       {
         "title": "Kalamar",