Update README.md

swithc chucks to chunks

Author: justincastilla

README.md

@@ -51,7 +51,7 @@ Try out Playground in Kibana with the following notebooks:
 - [`Document Chunking with Ingest Pipelines`](./notebooks/document-chunking/with-index-pipelines.ipynb)
 - [`Document Chunking with LangChain Splitters`](./notebooks/document-chunking/with-langchain-splitters.ipynb)
 - [`Calculating tokens for Semantic Search (ELSER and E5)`](./notebooks/document-chunking/tokenization.ipynb)
-- [`Fetch surrounding chucks`](./supporting-blog-content/fetch-surrounding-chunks/fetch-surrounding-chunks.ipynb)
+- [`Fetch surrounding chunks`](./supporting-blog-content/fetch-surrounding-chunks/fetch-surrounding-chunks.ipynb)
 
 ### Search