feat: move Pay what you want section

Author: PaulieScanlon

docs/pages/1.introduction.stories.mdx

@@ -47,6 +47,10 @@ Here's a pen, and some other blog post text
 
 <Box sx={{ height: '24px' }} />
 
+<PayWithStripe />
+
+<Box sx={{ height: '24px' }} />
+
 ## What others say
 
 <Grid sx={{ gridTemplateColumns: ['1fr', '1fr 1fr'], gridGap: 3 }}>
@@ -76,7 +80,3 @@ Thanks to the following who contributed to the old package [@pauliescanlon/gatsb
 - [Mike Bifulco](https://github.com/mbifulco)
 - [Zach Schnackel](https://github.com/zslabs)
 - [Alex Trost](https://github.com/a-trost)
-
-<Box sx={{ height: '24px' }} />
-
-<PayWithStripe />