fix npm arg

Author: scarmuega

docs/v2/installation/binary_release.mdx

@@ -33,7 +33,7 @@ brew install txpipe/tap/oura
 You can use NPM to install the latest version of Oura in supported systems (Mac / Linux)
 
 ```sh
-npm install @txpipe/oura
+npm install -g @txpipe/oura
 ```
 
 ## Download Binaries