docs: update

Author: barelyhuman

docs/index.md

@@ -38,7 +38,7 @@ go install github.com/barelyhuman/commitlog/v3@latest
 3. Using goblin
 
 ```sh
-curl -sf https://goblin.run/github.com/barelyhuman/commitlog/v3 | sh
+curl -sf https://goblin.run/github.com/barelyhuman/commitlog/v3 | OUT=commitlog sh
 ```
 
 Once installed you can just run `commitlog generate` or the shorter version