chore: correct menu item title

closes #140

src/.vuepress/components/Bar.vue

@@ -124,7 +124,7 @@ export default {
   data: () => ({
     editions,
     metaEdition: [
-      { title: 'Edition guidelines', to: '/editionguidelines.html' },
+      { title: 'Edition Guidelines', to: '/editionguidelines.html' },
       { title: 'Motifs', to: '/motifs.html' },
       { title: 'Manuscripts', to: '/manuscripts.html' },
       { title: 'Sayings', to: '/sayings.html' },