fix spelling mistake

Author: Austin Drefke

articles/search/cognitive-search-incremental-indexing-conceptual.md

@@ -23,7 +23,7 @@ Incremental enrichment adds caching and statefulness to an enrichment pipeline,
 
 Incremental enrichment adds a cache to the enrichment pipeline. The indexer caches the results from document cracking plus the outputs of each skill for every document. When a skillset is updated, only the changed, or downstream, skills are rerun. The updated results are written to the cache and the document is updated in the search index or the knowledge store.
 
-Physically, the cache is stored in a blob container in your Azure Storage account. The cache also needs access to Tables in the Storage Account for bookeeping. All indexes within a search service may share the same storage account for the indexer cache. Each indexer is assigned a unique and immutable cache identifier to the container it is using.
+Physically, the cache is stored in a blob container in your Azure Storage account. The cache also needs access to Tables in the Storage Account for book keeping. All indexes within a search service may share the same storage account for the indexer cache. Each indexer is assigned a unique and immutable cache identifier to the container it is using.
 
 ## Cache configuration