docs(website): Remove Kotlin from the additional languages

Remove Kotlin from the list of additional languages for Prism syntax
highlighting because it is enabled by default [1].

[1]: https://github.com/FormidableLabs/prism-react-renderer/blob/f27b612fe71865bde05f66faa3902b4daadce210/packages/generate-prism-languages/index.ts#L14

Signed-off-by: Martin Nonnenmacher <martin.nonnenmacher@bosch.io>

website/docusaurus.config.js

@@ -134,7 +134,7 @@ const config = {
       prism: {
         theme: lightCodeTheme,
         darkTheme: darkCodeTheme,
-        additionalLanguages: ['bash', 'kotlin'],
+        additionalLanguages: ['bash'],
       },
       algolia: {
         // The application ID provided by Algolia.