[mirotalksfu] - fix typo, add shareQr in config/env

.env.template

@@ -238,6 +238,7 @@ COPYRIGHT_TEXT=MiroTalk SFU, all rights reserved  # Copyright text
 # ----------------------------------------------------
 
 # Main Control Buttons
+SHOW_SHARE_QR=true                                # Show share room QR popup (true|false)
 SHOW_SHARE_BUTTON=true                            # Show share button (true|false)
 SHOW_HIDE_ME=true                                 # Show hide me button (true|false)
 SHOW_AUDIO_BUTTON=true                            # Show audio button (true|false)