Link GPU availability section to pricing page (#331)

* Link GPU availability section to pricing page

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* Add GPU pricing callout to warning tip

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

---------

Co-authored-by: ehfeng <279398+ehfeng@users.noreply.github.com>
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

Author: ehfeng

browsers/gpu-acceleration.mdx

@@ -5,7 +5,7 @@ title: GPU Acceleration
 GPU acceleration enables GPU-accelerated rendering in Kernel browsers, providing enhanced performance for graphics-intensive workloads.
 
 <Warning>
-GPU acceleration is only available for headful browsers and does not support [standby mode](/browsers/standby).
+GPU acceleration is only available for headful browsers and does not support [standby mode](/browsers/standby). GPU browsers have [separate pricing](https://kernel.sh/pricing) from headless or headful browsers.
 </Warning>
 
 ## Enable GPU acceleration
@@ -46,4 +46,4 @@ GPU acceleration is useful for:
 
 ## Availability
 
-GPU acceleration is available on Start-Up and Enterprise plans. Due to limited capacity during the research preview, GPU-enabled browsers may not always be available.
+GPU acceleration is available on [Start-Up and Enterprise plans](https://kernel.sh/pricing). Due to limited capacity during the research preview, GPU-enabled browsers may not always be available.