style: 💄 Fix text description

[ZedLi]

Description

Jeff noticed a typo in our description for vault ssh certificates cred library page.

Screenshots (if appropriate)

Checklist

• [x] I have added before and after screenshots for UI changes
• ~[ ] I have added JSON response output for API changes~
• ~[ ] I have added steps to reproduce and test for bug fixes in the description~
• ~[ ] I have commented on my code, particularly in hard-to-understand areas~
• [x] My changes generate no new warnings
• ~[ ] I have added tests that prove my fix is effective or that my feature works~

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Name	Status	Preview	Comments	Updated (UTC)
boundary-ui	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Sep 5, 2024 9:36pm
boundary-ui-desktop	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Sep 5, 2024 9:36pm