snapshot: bump version

We added support for VMGenID on Aarch64 systems. This means that we
cannot load snapshots taken with previous versions of Firecracker. Bump
the snapshot major version.

Signed-off-by: Babis Chalios <bchalios@amazon.es>

src/vmm/src/persist.rs

@@ -157,7 +157,7 @@ pub enum CreateSnapshotError {
 }
 
 /// Snapshot version
-pub const SNAPSHOT_VERSION: Version = Version::new(2, 0, 0);
+pub const SNAPSHOT_VERSION: Version = Version::new(3, 0, 0);
 
 /// Creates a Microvm snapshot.
 pub fn create_snapshot(