add keys for translation

src/lang/en.json

@@ -692,5 +692,8 @@
     "PushDeer Key": "PushDeer Key",
     "wayToGetClickSendSMSToken": "You can get API Username and API Key from {0} .",
     "Custom Monitor Type": "Custom Monitor Type",
-    "Google Analytics ID": "Google Analytics ID"
+    "Google Analytics ID": "Google Analytics ID",
+    "Edit Tag": "Edit Tag",
+    "Server Address": "Server Address",
+    "Learn More": "Learn More"
 }

src/pages/ManageMaintenance.vue

@@ -62,7 +62,7 @@
             </div>
 
             <div class="text-center mt-3" style="font-size: 13px;">
-                <a href="https://github.com/louislam/uptime-kuma/wiki/Maintenance" target="_blank">Learn More</a>
+                <a href="https://github.com/louislam/uptime-kuma/wiki/Maintenance" target="_blank">{{ $t("Learn More") }}</a>
             </div>
 
             <Confirm ref="confirmPause" :yes-text="$t('Yes')" :no-text="$t('No')" @yes="pauseMaintenance">