Add proxies to billing page

Author: juecd

info/pricing.mdx

@@ -15,6 +15,8 @@ With Kernel, you only pay for what you use and nothing more. Our goal is to be c
 | Browser persistence | ✅ | ✅ | ✅ |
 | Browser live view & logs | ✅ | ✅ | ✅ |
 | Browser viewports | ✅ | ✅ | ✅ |
+| Managed stealth mode | ✅ | ✅ | ✅ |
+| Configurable & BYO proxies | ✅ | ✅ | ✅ |
 | Browser replays | ❌ | ✅ | ✅ |
 | Browser profiles | ❌ | ✅ | ✅ |
 | File uploads & downloads | ❌ | ✅ | ✅ |