bug: 📝 Error in the plugin install command in the documentation

[philippart-s]

THe explanation line to install the plugin doesn't work :

pulumi-ovh/docs/installation-configuration.md

Line 25 in 5a27607

pulumi plugin install resource ovh <version> --server api://github.com/ovh/pulumi-ovh

The correct installation command is pulumi plugin install resource ovh vX.Y.Z --server https://github.com/ovh/pulumi-ovh/releases/download/vX.Y.Z/