Fix Stripe Projects browser API access pricing to real by-browser-type rates (#458)

Author: masnwilliams

integrations/stripe-projects-browser.mdx

@@ -43,7 +43,7 @@ kernel browsers create
 
 | Situation | Price |
 |-----------|--------|
-| No active Kernel plan on the org | Usage-based: **$0.01/min** (standard), **$0.02/min** (stealth) |
+| No active Kernel plan on the org | Usage-based by browser type: **$0.001/min** headless, **$0.008/min** headful, **$0.048/min** headful + GPU (stealth included) |
 | Active `plan:developer`, `plan:hobbyist`, or `plan:startup` | **Included** with plan (component pricing `free` under parent plan) |
 
 Provision a plan first when the developer needs predictable monthly credits and concurrency limits.

integrations/stripe-projects.mdx

@@ -19,7 +19,7 @@ Stripe service slugs are prefixed with `kernel/` (from the app manifest name).
 | `kernel/browser:api-access` | deployable | project | API key for launching browsers in a Stripe Project |
 
 - Only **one plan** can be active per Kernel org at a time (`allowed_updates` defines upgrade/downgrade paths).
-- `browser:api-access` is **free** when any active plan is provisioned; otherwise it is usage-based (\$0.01/min standard, \$0.02/min stealth).
+- `browser:api-access` is **free** when any active plan is provisioned; otherwise it is usage-based by browser type (\$0.001/min headless, \$0.008/min headful, \$0.048/min headful + GPU; stealth included).
 
 ## Common CLI flows