fix(parser): exclude "url" metadata from Remind output (since version 06.02.02 of remind)

Previously, only "due" metadata was excluded when generating Remind
output. This change also skips "url" metadata, preventing it from
appearing in the Remind string.

Version 06.02.02 of remind supports "url" metadata.

internal/parser/parser.go

@@ -89,7 +89,7 @@ func (t Task) ToRemind() string {
 
 	if len(t.Metadata) > 0 {
 		for k, values := range t.Metadata {
-			if k == "due" {
+			if k == "due" || k == "url" {
 				continue
 			}
 			// uppercase first letter for Remind