chore: bump rust version from 1.81 to 1.88

Author: sangwa

enclaver/Cargo.toml

@@ -2,7 +2,7 @@
 name = "enclaver"
 version = "0.5.0"
 edition = "2021"
-rust-version = "1.81"
+rust-version = "1.88"
 default-run = "enclaver"
 
 [[bin]]