Toggle Switch: fix link to progressive disclosure

Created by: siddharthkp

- "/ui-patterns/progressive-disclosure"
+ "/design/ui-patterns/progressive-disclosure"

awkward situation where it will break in staging but not in production. @colebemis Am I doing this right?

content/components/toggle-switch.mdx

@@ -142,7 +142,7 @@ import {Box} from '@primer/react'
   sx={{gap: 3}}
 >
   <Box as="p" mt="0">
-    The <a href="/ui-patterns/progressive-disclosure">progressive disclosure pattern</a> may be used to hide or show
+    The <a href="/design/ui-patterns/progressive-disclosure">progressive disclosure pattern</a> may be used to hide or show
     content based on whether a toggle switch is on. Content revealed on toggle switch activation should always come{' '}
     <em>after</em> the toggle switch.
   </Box>