Network config: Fix aria label

Bug: 801585
Change-Id: I956c90e6e6d6f966a294263da8392bf12da4914f
Reviewed-on: https://chromium-review.googlesource.com/c/1260486Reviewed-by: Toni Baržić <tbarzic@chromium.org>
Commit-Queue: Steven Bennetts <stevenjb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#596768}

ui/webui/resources/cr_components/chromeos/network/network_config.html

@@ -154,7 +154,7 @@
         <cr-toggle id="share" checked="{{shareNetwork_}}"
             disabled="[[!shareIsEnabled_(guid, configProperties_.*,
                       security_, eapProperties_.*, shareAllowEnable)]]"
-            aria-label="[[i18n('networkConfigShare')]]">
+            aria-labeledby="shareLabel">
         </cr-toggle>
       </div>
     </template>