[fenix] no issue: update accessibility comment for device icon

app/src/main/res/values/strings.xml

@@ -129,7 +129,7 @@
     <string name="recent_tabs_search_term_count_2">%d sites</string>
     <!-- Text for button in synced tab card that opens synced tabs tray -->
     <string name="recent_tabs_see_all_synced_tabs_button_text">See all synced tabs</string>
-    <!-- Accessibility description for icon for recent synced tab -->
+    <!-- Accessibility description for device icon used for recent synced tab -->
     <string name="recent_tabs_synced_device_icon_content_description">Synced device</string>
     <!-- Text for the menu button to remove a grouped highlight from the user's browsing history
          in the Recently visited section -->