Fix parameter type completed in Pass.hpp

Signed-off-by: Tobias Frisch <tfrisch@uni-koblenz.de>

include/vkcv/Pass.hpp

@@ -18,7 +18,7 @@ namespace vkcv {
 						  Multisampling multisampling = Multisampling::None);
 
 	PassHandle passSwapchain(Core &core, const SwapchainHandle &swapchain,
-							 const std::vector<vk::Format> formats, bool clear = true,
+							 const std::vector<vk::Format> &formats, bool clear = true,
 							 Multisampling multisampling = Multisampling::None);
 
 } // namespace vkcv