Update CHANGELOG-1.11.0.md for 1649.

[donatwork]

Add known issue of mounts failing with NVMe on PowerStore. Issue 1469.

Description

Add 1469 to list of known issues.

GitHub Issues

List the GitHub issues impacted by this PR:

GitHub Issue #
1469

Checklist:

• I have performed a self-review of my own code to ensure there are no formatting, vetting, linting, or security issues
• I have verified that new and existing unit tests pass locally with my changes
• I have not allowed coverage numbers to degenerate
• I have maintained at least 90% code coverage
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• I have maintained backward compatibility

How Has This Been Tested?

Visual check of text.

[csmbot]

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[gallacher]

This should be added to the known issues section of the change log for 1.11