typo fix

Author: areibman

README.md

@@ -90,7 +90,7 @@ print(count_string_tokens(prompt="Hello world", model="gpt-3.5-turbo"))
 ```
 
 ## Cost table
-Units denominated in USD.. All prices can be located in `model_prices.json`.
+Units denominated in USD. All prices can be located in `model_prices.json`.
 
 
 * Prices last updated Jan 30, 2024 from: https://openai.com/pricing and https://github.com/BerriAI/litellm/blob/main/model_prices_and_context_window.json