ffmpeg8: update to 8.1.2

Addresses https://app.opencve.io/cve/CVE-2026-8461

multimedia/ffmpeg8/Portfile

@@ -11,7 +11,7 @@ name                ffmpeg8
 set my_name         ffmpeg
 
 # version synced with ffmpeg port
-version             8.1.1
+version             8.1.2
 revision            0
 
 license             LGPL-2.1+
@@ -54,9 +54,9 @@ distname            ${my_name}-${version}
 dist_subdir         ${my_name}
 use_xz              yes
 
-checksums           rmd160  35674c08071dd040d8a223e91b9ce3a3ea3d6e8a \
-                    sha256  b6863adde98898f42602017462871b5f6333e65aec803fdd7a6308639c52edf3 \
-                    size    11709440
+checksums           rmd160  7b6b2b982a22338f38022a0149f7c9f15f6df4ff \
+                    sha256  464beb5e7bf0c311e68b45ae2f04e9cc2af88851abb4082231742a74d97b524c \
+                    size    11710924
 
 depends_build-append \
                     port:cctools \