refactor: Rename ripple namespace to xrpl

include/xrpl/ledger/PaymentSandbox.h

@@ -8,7 +8,7 @@
 
 #include <map>
 
-namespace ripple {
+namespace xrpl {
 
 namespace detail {
 
@@ -188,6 +188,6 @@ private:
     PaymentSandbox const* ps_ = nullptr;
 };
 
-}  // namespace ripple
+}  // namespace xrpl
 
 #endif