chore: add the deprecation marker back

PiperOrigin-RevId: 907793348

Author: wanlin31

src/interactions/resources/interactions.ts

@@ -391,7 +391,7 @@ export namespace ContentDelta {
       | 'audio/mulaw';
 
     /**
-     * Deprecated. Use sample_rate instead. The value is ignored.
+     * @deprecated Deprecated. Use sample_rate instead. The value is ignored.
      */
     rate?: number;