feat(docs): Fix LlamaIndex spelling and slug in documentation

Corrected spelling of 'LlamaIndex' and updated slug.

Author: jancurn

sources/platform/integrations/ai/llama.md

@@ -1,9 +1,9 @@
 ---
 title: LlamaIndex integration
 description: Learn how to integrate Apify with LlamaIndex in order to feed vector databases and LLMs with data crawled from the web.
-sidebar_label: Llamaindex
+sidebar_label: LlamaIndex
 sidebar_position: 6
-slug: /integrations/llama
+slug: /integrations/llama-index, /integrations/llama
 ---
 
 **Learn how to integrate Apify with LlamaIndex to feed vector databases and LLMs with data crawled from the web.**