Update README to remove image and refine objective

Removed image from README and clarified API objective.

Author: dsapandora

README.md

@@ -4,8 +4,6 @@ REST API to **index** and **query** documents in a vector database: k-Nearest Ne
 
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-<img width="1426" height="827" alt="Captura de pantalla 2026-01-30 a las 14 33 51" src="https://github.com/user-attachments/assets/4876a949-dada-4530-8cbd-051d20c36596" />
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 ## Objective