Fix some ineffective placeholders in a couple log lines (#5729)

Was producing `Presence: %s unavailable` in the logs.

src/Presence.ts

@@ -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;
         }
     }