[#71] update docu

include/vkcv/PipelineConfig.hpp

 #pragma once
 /**
  * @authors Mara Vogt, Mark Mints
- * @file src/vkcv/Pipeline.hpp
- * @brief Pipeline class to handle shader stages
+ * @file src/vkcv/PipelineConfig.hpp
+ * @brief Graphics Pipeline Config Struct to hand over required information to Pipeline Creation
  */
 
 #include <vector>

src/vkcv/PipelineManager.hpp

@@ -36,7 +36,7 @@ namespace vkcv
          * On application level it is necessary first to fill a PipelineConfig Struct.
          * @param config Hands over all needed information for pipeline creation.
          * @param passManager Hands over the corresponding render pass.
-         * @return A Handler to the created Pipeline Object.
+         * @return A Handler to the created Graphics Pipeline Object.
          */
         PipelineHandle createPipeline(const PipelineConfig &config, PassManager& passManager);