Adds functional breaking change warning for empty ApplicationRegion or ApplicationPreferredRegions fix. (#4998)

# Pull Request Template

## Description

Please include a summary of the change and which issue is fixed. Include
samples if adding new API, and include relevant motivation and context.
List any dependencies that are required for this change.

## Type of change

Please delete options that are not relevant.

- [] Bug fix (non-breaking change which fixes an issue)
- [] New feature (non-breaking change which adds functionality)
- [] Breaking change (fix or feature that would cause existing
functionality to not work as expected)
- [] This change requires a documentation update

## Closing issues

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Co-authored-by: Kiran Kumar Kolli <kirankk@microsoft.com>

Author: jeet1995

changelog.md

@@ -73,7 +73,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - [4781](https://github.com/Azure/azure-cosmos-dotnet-v3/pull/4781) AppInsights: Adds classic attribute back to cosmos db to support appinsights sdk.
 
 - [4709](https://github.com/Azure/azure-cosmos-dotnet-v3/pull/4709) Availability: Adds account-level read regions as effective preferred regions when preferred regions is not set on client.
-
+  **Warning:** BoundedStaleness accounts configured with-out `ApplicationRegion` or `ApplicationPreferredRegions` and just global endpoint, will also have cross-region high availability but might see eventual reads from read-regions. Applications can set `CosmosClientOptions.LimitToEndpoint` to limit interactions to the configured endpoint only as workaround ``
 - [4810](https://github.com/Azure/azure-cosmos-dotnet-v3/pull/4810) Package Upgrade: Refactors code to upgrade DiagnosticSource Library from 6.0.1 to 8.0.1
 
 - [4794](https://github.com/Azure/azure-cosmos-dotnet-v3/pull/4794) Query: Adds hybrid search query pipeline stage