Minor fixes (#15491)

src/openrct2-ui/scripting/CustomWindow.cpp

@@ -28,6 +28,7 @@
 #    include <openrct2/sprites.h>
 #    include <optional>
 #    include <string>
+#    include <utility>
 #    include <vector>
 
 using namespace OpenRCT2;

src/openrct2/core/Crypt.OpenRCT2.cpp

@@ -17,7 +17,7 @@
 
 using namespace Crypt;
 
-class OpenRCT2FNV1aAlgorithm : public FNV1aAlgorithm
+class OpenRCT2FNV1aAlgorithm final : public FNV1aAlgorithm
 {
 private:
     static constexpr uint64_t Offset = 0xCBF29CE484222325ULL;