templates: fix typo

Author: ikreymer

pywb/templates/frame_insert.html

@@ -26,7 +26,7 @@
 <div id="app" style="width: 100%; height: 200px"></div>
 <script>
     VueUI.main("{{ static_prefix }}", "{{ url }}", "{{ wb_prefix }}", "{{ timestamp }}", "{{ ui.logo }}", "{{ ui.navbar_background_hex | default('f8f9fa') }}", "{{ ui.navbar_color_hex | default('212529') }}", "{{ ui.navbar_light_buttons }}", "{{ env.pywb_lang | default('en') }}",
-      allLocales, i18nString, "{{ ui.logo_home_url }}");
+      allLocales, i18nStrings, "{{ ui.logo_home_url }}");
 </script>
 
 <div id="wb_iframe_div">