package/frr: security bump version to 9.1.2
For release note, see:
https://frrouting.org/release/9.1.2/
Fixes:
https://nvd.nist.gov/vuln/detail/CVE-2024-44070
Signed-off-by: Julien Olivain <ju.o@free.fr>
Reviewed-by: Vincent Jardin <vjardin@free.fr>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>