Bugfix/fix sonarcube findings (#6369)

* Fix sonarcube findings.
---------
Co-authored-by: Kim Kulling <kim.kulling@draeger.com>

code/PostProcessing/ComputeUVMappingProcess.h

@@ -58,7 +58,7 @@ namespace Assimp {
 /** ComputeUVMappingProcess - converts special mappings, such as spherical,
  *  cylindrical or boxed to proper UV coordinates for rendering.
 */
-class ComputeUVMappingProcess : public BaseProcess {
+class ComputeUVMappingProcess final : public BaseProcess {
 public:
     ComputeUVMappingProcess() = default;
     ~ComputeUVMappingProcess() override = default;