Update pre-publish panel wording to accurately describe the review process

[sarthaknagoshe2002]

fixes: #65368

What?

This PR updates the pre-publish panel description shown to contributors when submitting a post for review. The updated text removes assumptions about the role of the reviewer and eliminates unnecessary wording for better clarity.

Why?

The previous wording inaccurately implied that only users with the Editor role could review and publish the post. In reality, any user with the publish capability can do so. Additionally, "When you’re ready" was redundant since users are already prompted to click "Submit for Review."

How?

Replaced "an Editor will be able to approve it for you" with "a user with publishing permissions can review it for you."
Removed "When you’re ready" to streamline the message.

Testing Instructions

1. Log in as a Contributor
2. Create a new post.
3. Click "Submit for Review."
4. Verify Updated Message
5. Check the pre-publish panel description for clarity and accuracy.
6. Ensure the text no longer references "Editor" or includes redundant phrasing.

Screenshots or screencast

Before	After

[github-actions]

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Co-authored-by: sarthaknagoshe2002 <[email protected]>
Co-authored-by: afercia <[email protected]>
Co-authored-by: jasmussen <[email protected]>
Co-authored-by: hanneslsm <[email protected]>

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[sarthaknagoshe2002]

As per the suggestion give by @hanneslsm, here are the visuals of the changes.

[afercia]

Looks good to me, thanks!
Pending design feedback. Cc @WordPress/gutenberg-design

[jasmussen]

Seems good, thanks for the PR.

[afercia]

LGTM