docs: avoid nested tabs, nest note instead (#370)

docs/src/modules/javascript/pages/kickstart.adoc

@@ -34,51 +34,38 @@ The code generation tools create a new development project named `my-entity`, th
 . To create the initial codebase, from a command window enter the following:
 +
 [.tabset]
-====
-
-JavaScript::
-+
-[.tabset]
 npm:::
 +
 --
 [source, command window, subs="attributes"]
 ----
 npx @kalix-io/create-kalix-entity@latest my-entity
 ----
---
-yarn:::
-+
---
+[NOTE]
+====
+To generate TypeScript sources add the `--typescript` option:
 [source, command window, subs="attributes"]
 ----
-yarn create @kalix-io/kalix-entity@latest my-entity
+npx @kalix-io/create-kalix-entity@latest my-entity --typescript
 ----
+====
 --
-
-TypeScript::
-+
-[.tabset]
-npm:::
+yarn:::
 +
 --
 [source, command window, subs="attributes"]
 ----
-npx @kalix-io/create-kalix-entity@latest my-entity --typescript
+yarn create @kalix-io/kalix-entity@latest my-entity
 ----
---
-yarn:::
-+
---
+[NOTE]
+====
+To generate TypeScript sources add the `--typescript` option:
 [source, command window, subs="attributes"]
 ----
 yarn create @kalix-io/kalix-entity@latest my-entity --typescript
 ----
---
-
 ====
-+
-NOTE: To generate TypeScript sources add the `--typescript` option.
+--
 
 . Change directories to the newly created folder:
 +