Exclude 'benchmarks' from codecov report (opensearch-project#8805)

Signed-off-by: Ketan Verma <ketan9495@gmail.com>

Author: ketanv3

CHANGELOG.md

@@ -87,6 +87,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 - Perform aggregation postCollection in ContextIndexSearcher after searching leaves ([#8303](https://github.com/opensearch-project/OpenSearch/pull/8303))
 - Make Span exporter configurable ([#8620](https://github.com/opensearch-project/OpenSearch/issues/8620))
 - Change InternalSignificantTerms to sum shard-level superset counts only in final reduce ([#8735](https://github.com/opensearch-project/OpenSearch/pull/8735))
+- Exclude 'benchmarks' from codecov report ([#8805](https://github.com/opensearch-project/OpenSearch/pull/8805))
 
 ### Deprecated
 

codecov.yml

@@ -3,6 +3,7 @@ codecov:
 
 ignore:
   - "test"
+  - "benchmarks"
 
 coverage:
   precision: 2