[keel] Address undefined behavior

src/olympic/keel/include/keel/typeconv.hpp

@@ -214,7 +214,7 @@ class Converter {
 		}
 		[[nodiscard]]
 		BaseConverter const &converter() const noexcept {
-			return *m_buff.data();
+			return *std::launder(m_buff.data());
 		}
 };