chore(docs) : adds necessity of GPU

rag/rag-springai-ollama-llm/ReadMe.md

@@ -2,6 +2,8 @@
 
 The use of the pgvector store with the ollama model is not feasible due to the generation of 4096 dimensions by the latter, which exceeds pg vector's indexing support limit of less than 2000 dimensions. This limitation hinders the ease of querying the embedding store due to the absence of indexing.
 
+As LLMs needs heavy computational power, it needs GPU to be enabled for quickly processing using the complex Math operations behind the scenens.
+
 ### Testcontainers support
 
 This project uses [Testcontainers at development time](https://docs.spring.io/spring-boot/docs/3.2.4/reference/html/features.html#features.testing.testcontainers.at-development-time).