Change Radicle install command — radicle-explorer

This makes the command compatible with user that use e.g. the fish shell.

       Run the following command and follow the instructions to install Radicle
       and get started.
     </div>
     <Command fullWidth command="sh <(curl -sSf https://radicle.xyz/install)" />
     <Command fullWidth command="curl -sSf https://radicle.xyz/install | sh" />
   {/if}
 </div>