librbd/ConfigWatcher: fix a missing 'override'

dropped in PR#62188

Signed-off-by: Ronen Friedman <rfriedma@redhat.com>

diff --git a/src/librbd/ConfigWatcher.cc b/src/librbd/ConfigWatcher.cc
index 48a8db6d76e2a635472735fa2867a74a1745ce0c..2f6375ef7b958ff29bc4ebf676342f2f65179bc9 100644 (file)
--- a/src/librbd/ConfigWatcher.cc
+++ b/src/librbd/ConfigWatcher.cc
@@ -42,7 +42,7 @@ struct ConfigWatcher<I>::Observer : public md_config_obs_t {
     }
   }
 
-  std::vector<std::string> get_tracked_keys() const noexcept {
+  std::vector<std::string> get_tracked_keys() const noexcept override {
     return m_config_key_strs;
   }