updated CHANGELOG.md with ARM SSBD fix

Signed-off-by: George Pisaltu <[email protected]>
Signed-off-by: alindima <[email protected]>

Author: georgepisaltu

CHANGELOG.md

@@ -12,6 +12,8 @@
   flushed to their backing mediums as part of the CreateSnapshot operation.
 - Fixed race between vcpu initialization and emulation thread which could
   potentially lead to segmentation faults.
+- Fixed the SSBD mitigation not being enabled on `aarch64` with the provided
+  `prod-host-setup.md`, by force-enabling it.
 
 ## [0.23.3]