Update dlp-on-premises-scanner-get-started.md

[aamalhot]

should be on-premises instead of Endpoint DLP since this is on-prem DLP doc

[aamalhot]

@chrfox please review

[opbld33]

Docs Build status updates of commit e1bc4a2:

:white_check_mark: Validation status: passed

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microsoft-365/compliance/dlp-on-premises-scanner-get-started.md	:white_check_mark:Succeeded

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[opbld31]

Docs Build status updates of commit ab05469:

:white_check_mark: Validation status: passed

File	Status	Preview URL	Details
microsoft-365/compliance/dlp-on-premises-scanner-get-started.md	:white_check_mark:Succeeded

For more details, please refer to the build report.

Note: Broken links written as relative paths are included in the above build report. For broken links written as absolute paths or external URLs, see the broken link report.

For any questions, please:

• Try searching the docs.microsoft.com contributor guides
• Post your question in the Docs support channel