CVE-2023-5217 - update libvpx to 1.13.1

[licaon-kter]

ref: https://www.openwall.com/lists/oss-security/2023/09/28/5

ref: BelledonneCommunications/linphone-android#2170

[licaon-kter]

any blockers?

[BenSartor]

Sorry for the late reply. I became father a couple of month ago.

Liblinphone fixed the issue only in the 5.4 branch which is still alpha like linphone-android 6.0.