Reduce keywords due to packaging limit

Cargo.toml

@@ -8,7 +8,7 @@ repository = "https://github.com/gwihlidal/vk-sync-rs"
 documentation = "https://docs.rs/vk-sync"
 description = "Simplification of core Vulkan synchronization mechanisms such as pipeline barriers and events."
 categories = ["api-bindings", "rendering", "rendering::engines", "rendering::graphics-api", ]
-keywords = ["vulkan", "vk", "ash", "synchronization", "transition", "barrier", "event", "graphics", "3d", "compute", "gamedev"]
+keywords = ["vulkan", "vk", "ash", "graphics", "3d"]
 readme = "README.md"
 exclude = [
     ".travis.yml",