Add exclude to package.

Cargo.toml

@@ -3,7 +3,7 @@ authors = ["Zhenyuan Zhang <[email protected]>"]
 categories = ["science", "text-processing"]
 description = "An implementation of the RWKV language model in pure WebGPU."
 edition = "2021"
-exclude = ["assets/", "screenshots/, crates/"]
+exclude = ["assets/", "screenshots/"]
 homepage = "https://github.com/cryscan/web-rwkv"
 keywords = ["deep-learning", "language", "model", "rwkv"]
 license = "MIT OR Apache-2.0"
@@ -16,6 +16,7 @@ authors.workspace = true
 categories.workspace = true
 description.workspace = true
 edition.workspace = true
+exclude = ["assets/", "crates/", "screenshots/"]
 homepage.workspace = true
 keywords.workspace = true
 license.workspace = true