distinguish API down from unreachable in status command

When /status returns a non-2xx response the API is reachable but
unhealthy, so report it as down rather than reusing the generic
'could not reach' message used for transport errors.

Author: jarugupj

cmd/status.go

@@ -50,7 +50,7 @@ func runStatus(cmd *cobra.Command, args []string) error {
 	defer resp.Body.Close()
 
 	if resp.StatusCode < 200 || resp.StatusCode >= 300 {
-		pterm.Error.Println("Could not reach Kernel API. Check https://status.kernel.sh for updates.")
+		pterm.Error.Println("Kernel API is down. Check https://status.kernel.sh for updates.")
 		return nil
 	}