docs(596-verify): the probe follows compat:sycl-runtime to 2026.09.11

The farms took new keys when `libnvidia-pkcs11*` left them, and the chain that
delivers them moved with it. The default here is the version the ecosystem now
publishes as latest.

Author: speak-agent

.agents/docs/2026-09-10-596-verify.sh

@@ -33,7 +33,7 @@ set -u
 VER="${MCPP_VERIFY_VERSION:?set MCPP_VERIFY_VERSION}"
 STORE="${MCPP_VERIFY_BIN:-$HOME/.xlings/data/xpkgs/xim-x-mcpp/$VER/bin/mcpp}"
 SENTINEL_VER="${MCPP_VERIFY_SENTINEL:-0.0.2}"
-COMPAT_VER="${MCPP_VERIFY_COMPAT:-2026.09.10}"
+COMPAT_VER="${MCPP_VERIFY_COMPAT:-2026.09.11}"
 
 fails=0
 skipped=""