Fixed typos in README.

Author: umarbutler

CHANGELOG.md

@@ -5,6 +5,9 @@ All notable changes to `semchunk` will be documented here. This project adheres
 ### Added
 - Memoized `chunk()`.
 
+### Fixed
+- Fixed typos in README.
+
 ## [0.2.0] - 2023-11-07
 ### Added
 - Added the `memoize` argument to `chunk()`, which memoizes token counters by default to significantly improve performance.

README.md

@@ -19,7 +19,7 @@ The code snippet below demonstrates how text can be chunked with `semchunk`:
 >>> text = 'The quick brown fox jumps over the lazy dog.'
 >>> chunk_size = 2 # A low chunk size is used here for demo purposes.
 >>> encoder = tiktoken.encoding_for_model('gpt-4')
->>> token_counter = lambda text: len(tiktoken.encoding_for_model(model).encode(text)) # `token_counter` may be swapped out for any function capable of counting tokens.
+>>> token_counter = lambda text: len(encoder.encode(text)) # `token_counter` may be swapped out for any function capable of counting tokens.
 >>> semchunk.chunk(text, chunk_size=chunk_size, token_counter=token_counter)
 ['The quick', 'brown fox', 'jumps over', 'the lazy', 'dog.']
 ```