chore: Better "use"

Signed-off-by: Tim Hårek Andreassen <tim@harek.no>

cmd/now.go

@@ -2,7 +2,6 @@ package cmd
 
 import (
 	"encoding/json"
-	"errors"
 	"fmt"
 
 	"git.sr.ht/~timharek/yr-go/yr"
@@ -10,15 +9,10 @@ import (
 )
 
 var nowCmd = &cobra.Command{
-	Use:     "now",
+	Use:     "now <location>",
 	Aliases: []string{"current", "n"},
 	Short:   "Get current forecasted weather",
-	Args: func(cmd *cobra.Command, args []string) error {
-		if len(args) < 1 || len(args) > 1 {
-			return errors.New("Need a maximum of one argument")
-		}
-		return nil
-	},
+	Args:    cobra.ExactArgs(1),
 	Run:     now,
 }