Correct typo in test name

The test name had a typo in the word "recipient." This commit corrects "recepient" to "recipient" to improve code readability and maintain consistency in naming conventions. This change does not modify any functional behavior of the tests.

client_test.go

@@ -2803,7 +2803,7 @@ func TestClient_sendSingleMsg(t *testing.T) {
 			t.Errorf("expected ErrGetSender, got %s", sendErr.Reason)
 		}
 	})
-	t.Run("fail with no recepient addresses", func(t *testing.T) {
+	t.Run("fail with no recipient addresses", func(t *testing.T) {
 		ctx, cancel := context.WithCancel(context.Background())
 		defer cancel()
 		PortAdder.Add(1)