feat: improve style of publication search box (#2533)

Added `form-control form-control-sm` to the search box so that it has the same appearance as the selectors

wowchemy/layouts/section/publication.html

@@ -18,7 +18,7 @@
 
       <div class="form-row mb-4">
         <div class="col-auto">
-          <input type="search" class="filter-search" placeholder="{{ i18n "search_placeholder" }}" autocapitalize="off"
+          <input type="search" class="filter-search form-control form-control-sm" placeholder="{{ i18n "search_placeholder" }}" autocapitalize="off"
           autocomplete="off" autocorrect="off" role="textbox" spellcheck="false">
         </div>
         <div class="col-auto">