fix: provider link referrer policy

[vwkd]

What does this PR do?

Add missing rel="noopener noreferrer" to "Open Provider" links in job details.

Related issue

none

AI disclosure (required)

Fredy accepts AI assisted contributions, but they have to be declared. An
undeclared AI PR will be closed. Tick exactly one box:

• ai:none - I wrote this myself. No AI generated code, text or commit messages.
• ai:assisted - AI helped with parts of it (autocomplete, refactoring, tests, docs). I reviewed and understand every line.
• ai:generated - AI produced most or all of this PR. I reviewed it, but it is largely machine written.

If you ticked ai:assisted or ai:generated, the three answers below are
mandatory. Keep them on the same line as the label.

Which AI:

How much:

Why:

Checklist

• yarn test:offline passes (or yarn test if the change touches a live provider)
• yarn lint and yarn format:check pass
• The change is useful for everybody, not a custom tweak for my own setup
• I have read and answered the AI disclosure above honestly

[orangecoding]

@vwkd thanks.
Can you fix the formatting issue before I merge it?