Fix config.cpp include in CMakeLists.txt of systems_design (Case sensitive)

Description

Build fails on unix systems, because config.cpp was written with capital letter (Config.cpp) in CMakeLists.txt, but the file name is config.cpp.

Testing Instructions

1. Configure project
2. See succesfull configurateion of build project

Developer Checklist

• Code has been tested locally and/or in pipeline.
• Merge conflicts resolved with the target branch.

systems_design/CMakeLists.txt

@@ -12,7 +12,7 @@ set(MODULE_NAME systems_design)
 set(MODULE_SOURCES
     src/common/missionData.cpp 
     src/systemsDesign.cpp 
-    src/common/Config.cpp 
+    src/common/config.cpp 
     src/standard/standardPlot.cpp
     src/virtual/virtualPlot.cpp
     src/standard/standardReport.cpp