Ignore CI failures due to unavailable depext

Co-authored-by: Jan Midtgaard <[email protected]>

Author: shym

packages/conf-aarch64-linux-gnu-gcc/conf-aarch64-linux-gnu-gcc.1/opam

@@ -20,3 +20,4 @@ Please install aarch64-linux-gnu-gcc manually, as there is no known package
 for it for your distribution."""
     {failure}
 x-maintenance-intent: ["(latest)"]
+x-ci-accept-failure: [ "alpine-3.22" "centos-9" "opensuse-15.6" "opensuse-tumbleweed" ]