fix(guide): incorrect path to test the cli (lingodotdev#583)

Author: khalatevarun

CONTRIBUTING.md

@@ -24,7 +24,7 @@ cd packages/cli
 pnpm run dev
 
 # in terminal window 2 - test the CLI
-cd package
+cd packages/cli
 pnpm lingo.dev --help # this command will use the current cli code + demo config from ./package/i18n.json
 ```