Update git checkout to a new commit hash

.github/actions/ksun/action.yml

@@ -12,7 +12,7 @@ runs:
         curl -LSs "https://raw.githubusercontent.com/KernelSU-Next/KernelSU-Next/next/kernel/setup.sh" | bash -s dev
 
         cd KernelSU-Next
-        git checkout 551ad80473f60e052917aec08abf5323b6ab2f7c
+        git checkout 5a4a71874caaad06aa126f761c93391de1d32361
 
         cd kernel
         COMMITS_COUNT=$(/usr/bin/git rev-list --count HEAD)