prepare release crate v1.5.1

Release v1.5.1 for bringing support of ppc64le and riscv64.

Signed-off-by: Yan Song <yansong.ys@antgroup.com>

Author: imeoer

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "dbs-snapshot"
-version = "1.5.0"
+version = "1.5.1"
 authors = [
     "Amazon Firecracker team <firecracker-devel@amazon.com>",
     "Kata Containers Developers",