doc: Fix README build target

Signed-off-by: Thomas Coudert <thomas.coudert@ovhcloud.com>

Author: thcdrt

README.md

@@ -265,7 +265,7 @@ Have a look in [CONTRIBUTING.md](https://github.com/ovh/ovhcloud-cli/blob/main/C
 
 ```sh
 # Build the OVHcloud cli
-make build
+make all
 
 # Cross-compile for other targets in ./dist
 make release-snapshot