fix: add command arg to Install component (#2402)

Author: kendaganio

docs/hydra/self-hosted/install.mdx

@@ -12,5 +12,5 @@ import Secure from '../../_common/secure.mdx'
 ```mdx-code-block
 import Install from '../../_common/install.mdx'
 
-<Install repo="hydra" name="Ory Hydra" />
+<Install repo="hydra" command="hydra" name="Ory Hydra" />
 ```