odhcp6c: update to Git HEAD (2025-12-18)

9a4d6fe802d2 dhcpv6: use stable IAID for IA_NA
d99528f7a91a odhcp6c: avoid clearing CLIENT_ID

https://github.com/openwrt/odhcp6c/compare/02e783c2f68c...9a4d6fe802d2

Signed-off-by: Álvaro Fernández Rojas <[email protected]>

package/network/ipv6/odhcp6c/Makefile

@@ -12,9 +12,9 @@ PKG_RELEASE:=1
 
 PKG_SOURCE_PROTO:=git
 PKG_SOURCE_URL=$(PROJECT_GIT)/project/odhcp6c.git
-PKG_SOURCE_DATE:=2025-12-17
-PKG_SOURCE_VERSION:=02e783c2f68c2ee16e1bed43369fa3029e32f70d
-PKG_MIRROR_HASH:=448258e0c816ac2a3935ab6bc346f6441752457027e7c8c1a669b16dd0ae9858
+PKG_SOURCE_DATE:=2025-12-18
+PKG_SOURCE_VERSION:=9a4d6fe802d21e4fc1b84f7d55b5c3c23e71d6ba
+PKG_MIRROR_HASH:=0be95faccad6b4c9107fc7819526f11b59eedc09454c8dcb0435450ff3afbf77
 
 PKG_MAINTAINER:=Álvaro Fernández Rojas <[email protected]>
 PKG_LICENSE:=GPL-2.0