chore: fix link to configuration docs in README

Author: rossiam

README.md

@@ -285,4 +285,4 @@ $ SMARTTHINGS_DEBUG=true smartthings <command>
 ```
 
 More details about advanced configuration and logging in the CLI can be found on the
-[configuration documentation page](https://github.com/SmartThingsCommunity/smartthings-cli/blob/master/packages/cli/doc/configuration.md).
+[configuration documentation page](https://github.com/SmartThingsCommunity/smartthings-cli/blob/main/doc/configuration.md).