fix: change non-existent 'mirror' icon to 'circle-user'

src/components/ImageMethodDialog.vue

@@ -132,7 +132,7 @@
                   v-if="shouldMirrorVideo"
                   class="absolute top-2 left-2 bg-black/50 text-white px-2 py-1 rounded text-xs"
                 >
-                  <font-awesome icon="mirror" class="w-[1em] mr-1" />
+                  <font-awesome icon="circle-user" class="w-[1em] mr-1" />
                   Mirrored
                 </div>
                 <div :class="cameraControlsClasses">