Fixed non existing url
Added url of wallet user guide on how to use Grin
@@ -115,7 +115,7 @@ say, for a Raspberry Pi.
## Using grin
-The wiki page [How to use grin](https://github.com/mimblewimble/docs/wiki/How-to-use-grin)
+The wiki page [Wallet User Guide](https://github.com/mimblewimble/docs/wiki/Wallet-User-Guide)
and linked pages have more information on what features we have,
troubleshooting, etc.
