fix a typo (#44)

Author: lu-zero

edge-nal-embassy/Cargo.toml

@@ -3,7 +3,7 @@ name = "edge-nal-embassy"
 version = "0.3.0"
 edition = "2021"
 rust-version = "1.77"
-description = "Am implementation of edge-nal based on `embassy-net`"
+description = "An implementation of edge-nal based on `embassy-net`"
 repository = "https://github.com/ivmarkov/edge-net"
 readme = "README.md"
 license = "MIT OR Apache-2.0"