message: Fix some ineffective placeholders in a couple log lines
  Was producing `Presence: %s unavailable` in the logs.
diff: @@ -99,9 +99,9 @@ class Presence {
  try {
  await MatrixClientPeg.get().setPresence(this.state);
  - console.info("Presence: %s", newState);
  + console.info("Presence:", newState);
  } catch (err) {
  - console.error("Failed to set presence: %s", err);
  + console.error("Failed to set presence:", err);
  this.state = oldState;
  }
  }
  