Updating example with correct flag

[djwfyi]

Community Contribution License

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under the terms of the [Apache 2 license] (https://www.apache.org/licenses/LICENSE-2.0).
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contributions to the project maintainers under the Apache 2 license.

Description

Tiny fix for the mc idp ldap accesskey ls help text examples.
One example has an incomplete flag name.

Motivation and Context

Correctness.

How to test this PR?

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Optimization (provides speedup with no functional changes)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• Fixes a regression (If yes, please add commit-id or PR # here)
• Unit tests added/updated
• Internal documentation updated
• Create a documentation update request here