e2ee: update comment

modules/RTC/RTC.js

         if (options.enableInsertableStreams) {
             logger.debug('E2EE - setting insertable streams constraints');
             iceConfig.encodedInsertableStreams = true;
-            iceConfig.forceEncodedAudioInsertableStreams = true; // legacy, to be removed in M85.
-            iceConfig.forceEncodedVideoInsertableStreams = true; // legacy, to be removed in M85.
+            iceConfig.forceEncodedAudioInsertableStreams = true; // legacy, to be removed in M88.
+            iceConfig.forceEncodedVideoInsertableStreams = true; // legacy, to be removed in M88.
         }
 
         if (browser.supportsSdpSemantics()) {