Fix windows no right-hand operand

Signed-off-by: Eugenio Collado <[email protected]>

ddsrecorder_participants/src/cpp/common/time_utils.cpp

@@ -63,7 +63,7 @@ utils::Timestamp to_std_timestamp(
         throw std::runtime_error("Failed to parse fractional part as an integer");
     }
 
-    time_point += std::chrono::nanoseconds(nanoseconds);
+    time_point = time_point + std::chrono::nanoseconds(nanoseconds);
 
     return time_point;
 }