fix: rollback libseccomp version

Rollback libseccomp version to keep in sync with runc

Signed-off-by: Mateusz Urbanek <mateusz.urbanek@siderolabs.com>

Author: shanduur

Pkgfile

@@ -159,9 +159,9 @@ vars:
 
   # NOTE: let's keep this in sync with runc: https://github.com/opencontainers/runc/blob/release-1.3/script/release_build.sh#L22
   # renovate: datasource=github-tags extractVersion=^v(?<version>.*)$ depName=seccomp/libseccomp
-  libseccomp_version: 2.6.0
-  libseccomp_sha256: 83b6085232d1588c379dc9b9cae47bb37407cf262e6e74993c61ba72d2a784dc
-  libseccomp_sha512: 9039478656d9b670af2ff4cb67b6b1fa315821e59d2f82ba6247e988859ddc7e3d15fea159eccca161bf2890828bb62aa6ab4d6b7ff55f27a9d6bd9532eeee1b
+  libseccomp_version: 2.5.6
+  libseccomp_sha256: 04c37d72965dce218a0c94519b056e1775cf786b5260ee2b7992956c4ee38633
+  libseccomp_sha512: c35d8d6f80ee38a96688955932c6bf369101409a470ecf0dc550013b19f57311be907a600adc4d2f4699fb8e94e8038333b4f5702edc3c26b14c36fb6e1c42fd
 
   # renovate: datasource=github-tags extractVersion=^v(?<version>.*)$ depName=urcu/userspace-rcu
   liburcu_version: 0.15.3