Fix Cargo.toml

Author: aosoft

unity-native-plugin-sys/Cargo.toml

@@ -8,7 +8,7 @@ description = "unity-native-plugin-sys"
 homepage = "https://github.com/aosoft/unity-native-plugin-rs"
 repository = "https://github.com/aosoft/unity-native-plugin-rs"
 readme = "README.md"
-categories = ["api-bindings", "Game engines"]
+categories = ["api-bindings", "game-engines"]
 keywords = ["unity", "ffi"]
 include = [
     "**/*.rs",

unity-native-plugin/Cargo.toml

@@ -7,7 +7,7 @@ description = "Unity Native Plugin API for Rust"
 homepage = "https://github.com/aosoft/unity-native-plugin-rs"
 repository = "https://github.com/aosoft/unity-native-plugin-rs"
 readme = "../README.md"
-categories = ["api-bindings", "Game engines"]
+categories = ["api-bindings", "game-engines"]
 keywords = ["unity"]
 edition = "2018"
 include = [