refactor: Rename ripple namespace to xrpl

include/xrpl/basics/UptimeClock.h

@@ -6,7 +6,7 @@
 #include <ratio>
 #include <thread>
 
-namespace ripple {
+namespace xrpl {
 
 /** Tracks program uptime to seconds precision.
 
@@ -45,6 +45,6 @@ private:
     start_clock();
 };
 
-}  // namespace ripple
+}  // namespace xrpl
 
 #endif