fix(monitoring): fix untranslated "common.refresh" key on Update Log button

Used a translation key that doesn't exist (common.refresh) instead of the
existing monitoring.refresh, so the button rendered the raw key instead of
"Aktualisieren"/"Refresh".

static/index.html

@@ -1266,7 +1266,7 @@
                     <div class="card-header d-flex justify-content-between align-items-center">
                         <span><i class="bi bi-clock-history me-2"></i><span data-i18n="monitoring.updateLogTitle">Update Log</span></span>
                         <button class="btn btn-outline-secondary btn-sm" onclick="loadUpdateLog()" id="btn-refresh-update-log">
-                            <i class="bi bi-arrow-clockwise me-1"></i><span data-i18n="common.refresh">Refresh</span>
+                            <i class="bi bi-arrow-clockwise me-1"></i><span data-i18n="monitoring.refresh">Refresh</span>
                         </button>
                     </div>
                     <div class="card-body" id="update-log-body">