Remove trailing periods from Show or hide settings panel

[Infinite-Null]

What?

This PR removes the trailing period from the command palette description for the Settings panel toggle.
Closes #69354

Why?

Modified the string Show or Hide the Settings panel. to remove the trailing period. This ensures consistency in the command palette UI.

Testing Instructions

1. Edit or create a new page
2. Open Command by Super + k
3. Search for show and see if Show or hide the Settings panel has trailing period

Screenshots

Before	After

[github-actions]

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Co-authored-by: Infinite-Null <[email protected]>
Co-authored-by: t-hamano <[email protected]>
Co-authored-by: shail-mehta <[email protected]>

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[t-hamano]

👍

[shail-mehta]

LGTM👍