Update retention.md

[madalenamedo]

Investigation done as part of the case review task for the EMEA Purview TA role.

Investigation was confirmed by Sr Tech Support Eng EEE LAURENTIU-ALEXANDRU ALBU (albul@microsoft.com)

[learn-build-service-prod]

Learn Build status updates of commit befc991:

❌ Validation status: errors

Please follow instructions here which may help to resolve issue.

File	Status	Preview URL	Details
	❌Error		Details

• [Error: CannotMergeCommit] Cannot merge commit befc991f10e9ebe0613d6c3e1e5c7c40e09fd4f9 in branch public of repository https://github.com/madalenamedo/microsoft-365-docs into branch public (commit 0f6d069368d046e713bba489601f69da7bda2577). Please follow this documentation: https://help.github.com/articles/resolving-a-merge-conflict-using-the-command-line/ to use git.exe to resolve you content conflicts locally and then push to remote.

For more details, please refer to the build report.

Note: Your PR may contain errors or warnings or suggestions unrelated to the files you changed. This happens when external dependencies like GitHub alias, Microsoft alias, cross repo links are updated. Please use these instructions to resolve them.