package/libnpupnp: bump to version 4.1.1

package/libnpupnp: bump to version 4.1.1

From https://www.lesbonscomptes.com/upmpdcli/pages/releases.html:

2021-03-13 libnpupnp 4.1.1
 * Fix HEAD requests. Samsung TVs now work with Gerbera + libnpupnp

2021-03-13 libnpupnp 4.1.0
 * Send SERVER and USER-AGENT headers in misc places where mandated or useful.
 * Add API for the client code to set the user-agent and server string values
 * Fix building and running with --disable-ipv6
 * Misc portability fixes.

Signed-off-by: Jörg Krause <joerg.krause@embedded.rocks>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>