Update index.md missing verb (run-llama#13007)

docs/docs/index.md

@@ -19,7 +19,7 @@ You may choose to **fine-tune** a LLM with your data, but:
 - Due to the cost to train, it's **hard to update** a LLM with latest information.
 - **Observability** is lacking. When you ask a LLM a question, it's not obvious how the LLM arrived at its answer.
 
-Instead of fine-tuning, one can a context augmentation pattern called [Retrieval-Augmented Generation (RAG)](./getting_started/concepts.md) to obtain more accurate text generation relevant to your specific data. RAG involves the following high level steps:
+Instead of fine-tuning, one can use a context augmentation pattern called [Retrieval-Augmented Generation (RAG)](./getting_started/concepts.md) to obtain more accurate text generation relevant to your specific data. RAG involves the following high level steps:
 
 1. Retrieve information from your data sources first,
 2. Add it to your question as context, and