Clarify Disk encryption support

[Tbohunek]

If I get this section correct, only ADE PMK is supported. DES PMK is not supported.

[prmerger-automator[bot]]

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@Tbohunek : Thanks for your contribution! The author(s) have been notified to review your proposed change.

[opbld30]

Learn Build status updates of commit 4e1064d:

:white_check_mark: Validation status: passed

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articles/defender-for-cloud/concept-agentless-data-collection.md	:white_check_mark:Succeeded

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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.

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[opbld33]

Learn Build status updates of commit 9ad9bc9:

:white_check_mark: Validation status: passed

File	Status	Preview URL	Details
articles/defender-for-cloud/concept-agentless-data-collection.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 learn.microsoft.com contributor guides
• Post your question in the Learn support channel

[Jak-MS]

@bmansheim

• Can you review this PR?
• IMPORTANT: When this content is ready to merge, you must add #sign-off in a comment or the approval may get overlooked.

#label:"aq-pr-triaged" @MicrosoftDocs/public-repo-pr-review-team

[bmansheim]

Confirmed by Matan Shabtay #sign-off

[bmansheim]

Replaced by https://github.com/MicrosoftDocs/azure-docs-pr/pull/218212 #please-close