Version checks: update wording to be more direct

[jeherve]

Proposed changes:

Let's try to be more direct, avoid "might", so folks feel more confident to run the tools when necessary.

See discussion here:
p1721792055521929-slack-CDLH4C1UZ

Other information:

• Have you written new tests for your changes, if applicable?
• Have you checked the E2E test CI results, and verified that your changes do not break them?
• Have you tested your changes on WordPress.com, if applicable (if so, you'll see a generated comment below with a script to run)?

Jetpack product discussion

• N/A

Does this pull request change what data or activity we track or use?

• No

Testing instructions:

Not much to test here, check the wording.

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