ChangeLog.md for #24199 (#24248)

* changelog.md for ntbr issue

* Update ChangeLog.md

* Update ChangeLog.md

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Co-authored-by: Jin Lei <[email protected]>

Author: AgarwalVivek

src/CosmosDB/CosmosDB/ChangeLog.md

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 ## Upcoming Release
+* Fixed validation issues in same-account collection/container/graph and database/table/Gremlin restores, affecting the following cmdlets:
+- Restore-AzCosmosDBSqlDatabase
+- Restore-AzCosmosDBSqlContainer
+- Restore-AzCosmosDBMongoDBDatabase
+- Restore-AzCosmosDBMongoDBCollection
+- Restore-AzCosmosDBGremlinDatabase
+- Restore-AzCosmosDBGremlinGraph
+- Restore-AzCosmosDBTable
 * Upgraded SDK `Azure.Security.KeyVault.Keys` TO 4.6.0-beta.1.
 * Added breaking change message for ListConnectionStrings changes