Update cloud hypervisor

```diff
-CLOUD_HYPERVISOR_VERSION="50.0-1gl3%2Bbp1877"
+CLOUD_HYPERVISOR_VERSION="50.0-1gl4%2Bbp1877"
```

Author: toanju

features/sci/exec.config

@@ -10,7 +10,7 @@ systemctl enable ssh
 # all versions URL encoded
 EDK2_VERSION="20250503-7gl0%2Bbp1877"
 LIBVIRT_VERSION="11.10.0-2gl5%2Bbp1877"
-CLOUD_HYPERVISOR_VERSION="50.0-1gl3%2Bbp1877"
+CLOUD_HYPERVISOR_VERSION="50.0-1gl4%2Bbp1877"
 
 mkdir /tmp/custompackages
 for p in https://github.com/gardenlinux/package-edk2-cloud-hypervisor-gl/releases/download/$EDK2_VERSION/build.tar.xz.0000 https://github.com/gardenlinux/package-libvirt/releases/download/$LIBVIRT_VERSION/build.tar.xz.0000 https://github.com/gardenlinux/package-cloud-hypervisor-gl/releases/download/$CLOUD_HYPERVISOR_VERSION/build.tar.xz.0000; do