Switch default durability to volatile (#521)

Signed-off-by: Yadunund <[email protected]>

Author: Yadunund

rmw_zenoh_cpp/src/detail/qos.cpp

@@ -26,7 +26,7 @@
 // a popular "magic number". See https://en.wikipedia.org/wiki/42_(number).
 #define RMW_ZENOH_DEFAULT_HISTORY_DEPTH 42;
 #define RMW_ZENOH_DEFAULT_RELIABILITY RMW_QOS_POLICY_RELIABILITY_RELIABLE;
-#define RMW_ZENOH_DEFAULT_DURABILITY RMW_QOS_POLICY_DURABILITY_TRANSIENT_LOCAL;
+#define RMW_ZENOH_DEFAULT_DURABILITY RMW_QOS_POLICY_DURABILITY_VOLATILE;
 #define RMW_ZENOH_DEFAULT_DEADLINE RMW_DURATION_INFINITE;
 #define RMW_ZENOH_DEFAULT_LIFESPAN RMW_DURATION_INFINITE;
 #define RMW_ZENOH_DEFAULT_LIVELINESS RMW_QOS_POLICY_LIVELINESS_AUTOMATIC;