update the dev-dependency of virtio-blk

Dependencies should be specified using caret requirements.

Signed-off-by: Andreea Florescu <[email protected]>

Author: andreeaflorescu

crates/devices/virtio-blk/Cargo.toml

@@ -21,5 +21,5 @@ virtio-device = { path = "../../virtio-device" }
 virtio-bindings = { path = "../../virtio-bindings", version = "0.1.0" }
 
 [dev-dependencies]
-vm-memory = { version = ">=0.8.0", features = ["backend-mmap", "backend-atomic"] }
+vm-memory = { version = "0.9.0", features = ["backend-mmap", "backend-atomic"] }
 virtio-queue = { path = "../../virtio-queue", features = ["test-utils"] }