[#57] fixed error from renaming

modules/material/CMakeLists.txt

@@ -12,8 +12,8 @@ set(vkcv_material_include ${PROJECT_SOURCE_DIR}/include)
 set(vkcv_material_sources
 		${vkcv_material_include}/vkcv/material/Material.hpp
 		${vkcv_material_source}/vkcv/material/Material.cpp
-		${vkcv_material_include}/vkcv/material/PBRMetallicRoughness.hpp
-		${vkcv_material_source}/vkcv/material/PBRMetallicRoughness.cpp
+		${vkcv_material_include}/vkcv/material/pbrMetallicRoughness.hpp
+		${vkcv_material_source}/vkcv/material/pbrMetallicRoughness.cpp
 )
 
 # adding source files to the module

modules/material/src/vkcv/material/pbrMetallicRoughness.cpp

-#include "vkcv/material/PBRMetallicRoughness.hpp"
+#include "vkcv/material/pbrMetallicRoughness.hpp"
 
 
 namespace vkcv::material