bridger: update to the latest version

def7755c459d add missing copyright headers
f68307fd96d7 add hairpin mode support
9ee8f433ba4e nl: do not pass NDA_VLAN with vid=0
978c1f9eed07 add support for the bridge port isolated flag

Signed-off-by: Felix Fietkau <nbd@nbd.name>

package/network/services/bridger/Makefile

@@ -10,9 +10,9 @@ include $(TOPDIR)/rules.mk
 PKG_NAME:=bridger
 PKG_SOURCE_PROTO:=git
 PKG_SOURCE_URL=https://github.com/nbd168/bridger
-PKG_SOURCE_DATE:=2022-04-06
-PKG_SOURCE_VERSION:=e8f6814a85b4ea951657e7018c5d77597400f44a
-PKG_MIRROR_HASH:=f917e099a9ab2a55745a7254239efabe695a722d5c448342198cdc847a4a24ac
+PKG_SOURCE_DATE:=2023-01-03
+PKG_SOURCE_VERSION:=978c1f9eed07504cc0b84f72ee7384aab722386a
+PKG_MIRROR_HASH:=2a019b188d8de2fdc95453529d1820b0a7a5576adf161bd19e182c9c1c2b2c85
 
 PKG_LICENSE:=GPL-2.0
 PKG_MAINTAINER:=Felix Fietkau <nbd@nbd.name>