Update serverless/pages/manage-your-project.asciidoc

Co-authored-by: shainaraskas <[email protected]>

serverless/pages/manage-your-project.asciidoc

@@ -38,7 +38,7 @@ The total volume of search-ready data is the sum of the following:
 
 [NOTE]
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-Time series data refers to any document in standard indices or data streams that include the `@timestamp` field. This field determines whether the data will be subject to the Search Boost Window setting.
+Time series data refers to any document in standard indices or data streams that includes the `@timestamp` field. This field must be present for data to be subject to the Search Boost Window setting.
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 Each project type offers different settings that let you adjust the performance and volume of search-ready data, as well as the features available in your projects.