Fix readme metadata

Author: vurvdev

rglua/Cargo.toml

@@ -5,7 +5,7 @@ version = "0.9.0"
 authors = ["Vurv <[email protected]>"]
 keywords = ["glua", "garrysmod", "lua", "gmod"]
 categories = ["api-bindings", "external-ffi-bindings", "development-tools::ffi", "game-development", "accessibility"]
-readme = "README.md"
+readme = "../README.md"
 license = "MIT"
 edition = "2021"
 repository = "https://github.com/Vurv78/rglua"