feat: serverless provisioning clarification

[johnharris85]

Description

Quick clarification change to ensure users know that Serverless Gateways may not be provisioned in their current Konnect region.

Testing instructions

Preview link:

Checklist

• Review label added
• Conditional version tags added, if applicable.

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[Guaris]

@cloudjumpercat This PR goes with #8126

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✅ Deploy Preview for kongdocs ready!

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🔨 Latest commit	a00dd39
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😎 Deploy Preview	https://deploy-preview-8161--kongdocs.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.
Lighthouse	9 paths audited Performance: 93 (🟢 up 2 from production) Accessibility: 92 (no change from production) Best Practices: 98 (🟢 up 8 from production) SEO: 99 (no change from production) PWA: - View the detailed breakdown and full score reports

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