Fixing spotbugswarnings - (Task #1184)

- Fixing Thermal Concept

---
Task #1184: Updating to Eclipse 2024/03 and all dependencies

de.dlr.sc.virsat.model.extension.thermal/src/de/dlr/sc/virsat/model/extension/thermal/cad/CadImporterThermal.java

@@ -115,7 +115,7 @@ public AnalysisResult importCadSimulationOutput(String path, String simulationOu
  String[] entry = line[0].replace("**", "").split(",");
  numberOfNodes[j] = Integer.parseInt(entry[0]);
  totalNumberOfNodes += numberOfNodes[j];
- totalNumberOfElements += Integer.valueOf(entry[1]);
+ totalNumberOfElements += Integer.parseInt(entry[1]);
  j++;
  }
  }