Allow gcc 12 compilation:

Compiling with gcc 12 on manjaro (arch variant) had compilation errors
without adding an additional include file.

src/ripple/basics/impl/Archive.cpp

@@ -23,6 +23,8 @@
 #include <archive.h>
 #include <archive_entry.h>
 
+#include <memory>
+
 namespace ripple {
 
 void