filter "truncate-mac-address-to-24-bits": match any second group in AVM UPnP device UUIDs

AVM varies the second UUID group per UPnP service (e.g. "bccb" for
InternetGatewayDevice, "e13e" for MediaServer), while "40e7" and the
fourth group stay fixed:

  uuid:XXXXXXXX-e13e-40e7-8e6c-AABBCCDDEEFF

Match any second group so the MAC address is truncated for all AVM
services.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

gitconfig

@@ -43,7 +43,7 @@
 	textconv = od -t x1z --
 
 [filter "truncate-mac-address-to-24-bits"]
-	clean = sed -E     -e 's/(^|[^[:xdigit:]:])([[:xdigit:]]{2}(:[[:xdigit:]]{2}){2})(:[[:xdigit:]]{2}){3}([^[:xdigit:]:]|$)/\\1\\2:…\\5/g'     -e 's/(-bccb-40e7-(8e6c|9f6c)-[[:xdigit:]]{6})[[:xdigit:]]{6}([^[:xdigit:]]|$)/\\1…\\3/gI'     -e 's/(:[[:xdigit:]]{0,4}:[[:xdigit:]]{0,2}ff:fe)[[:xdigit:]]{2}:[[:xdigit:]]{1,4}([^[:xdigit:]:]|$)/\\1…\\2/gI'
+	clean = sed -E     -e 's/(^|[^[:xdigit:]:])([[:xdigit:]]{2}(:[[:xdigit:]]{2}){2})(:[[:xdigit:]]{2}){3}([^[:xdigit:]:]|$)/\\1\\2:…\\5/g'     -e 's/(-[[:xdigit:]]{4}-40e7-(8e6c|9f6c)-[[:xdigit:]]{6})[[:xdigit:]]{6}([^[:xdigit:]]|$)/\\1…\\3/gI'     -e 's/(:[[:xdigit:]]{0,4}:[[:xdigit:]]{0,2}ff:fe)[[:xdigit:]]{2}:[[:xdigit:]]{1,4}([^[:xdigit:]:]|$)/\\1…\\2/gI'
 	smudge = cat
 	required = true