template: add unexpected_cfgs for spirv

Author: Firestar99

crates/shader-crate-template/Cargo.toml

@@ -6,6 +6,9 @@ edition = "2021"
 [lib]
 crate-type = ["rlib", "cdylib"]
 
+[lints.rust]
+unexpected_cfgs = { level = "allow", check-cfg = ['cfg(target_arch, values("spirv"))'] }
+
 # Dependencies for CPU and GPU code
 [dependencies]
 # TODO: use a simple crate version once v0.10.0 is released