Fix readme reference in Cargo.toml

Author: LPGhatguy

Cargo.toml

@@ -6,6 +6,7 @@ authors = ["Lucien Greathouse <[email protected]>"]
 license = "MIT"
 homepage = "https://github.com/rojo-rbx/foreman#readme"
 repository = "https://github.com/rojo-rbx/foreman"
+readme = "README.md"
 edition = "2018"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html