package/libnatpmp: bump version to 20230423

Updated license hash due to reformat of license file:
https://github.com/miniupnp/libnatpmp/commit/d89c1db679c09dbe71ba58b012e4afae2de06376

Signed-off-by: Bernd Kuhls <bernd@kuhls.net>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/libnatpmp/libnatpmp.hash

@@ -1,3 +1,3 @@
 # Locally computed
-sha256  e1aa9c4c4219bc06943d6b2130f664daee213fb262fcb94dd355815b8f4536b0  libnatpmp-20150609.tar.gz
-sha256  e8d8277e1a101fcfedb0cd5a1cc76646522c0da69f3490dd5a4055fc87ea96a2  LICENSE
+sha256  0684ed2c8406437e7519a1bd20ea83780db871b3a3a5d752311ba3e889dbfc70  libnatpmp-20230423.tar.gz
+sha256  7184f1e2114b518440962e7de67f0b9d5faa3789ba1f1a7ff33159bd26834b06  LICENSE

package/libnatpmp/libnatpmp.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-LIBNATPMP_VERSION = 20150609
+LIBNATPMP_VERSION = 20230423
 LIBNATPMP_SITE = http://miniupnp.free.fr/files
 LIBNATPMP_INSTALL_STAGING = YES
 LIBNATPMP_LICENSE = BSD-3-Clause