vmm: fix typo

Signed-off-by: Philipp Schuster <philipp.schuster@cyberus-technology.de>
On-behalf-of: SAP philipp.schuster@sap.com

Author: phip1611

vmm/src/api/mod.rs

@@ -117,8 +117,8 @@ pub enum ApiError {
     #[error("The VM could not be snapshotted")]
     VmSnapshot(#[source] VmError),
 
-    /// The VM could not restored.
-    #[error("The VM could not restored")]
+    /// The VM could not be restored.
+    #[error("The VM could not be restored")]
     VmRestore(#[source] VmError),
 
     /// The VM could not be coredumped.