Update search placeholder

app/views/crops/_search_bar.haml

@@ -1,6 +1,6 @@
 = form_tag search_crops_path, method: :get, class: 'form-inline my-2 my-lg-0', id: 'navbar-search' do
   .input-group
-    %input.form-control.mr-sm-2{name: 'term', "aria-label" => "Search", placeholder: "Search", type: "search"}/
+    %input.form-control.mr-sm-2{name: 'term', "aria-label" => "Search crops", placeholder: "Search crops", type: "search"}/
     %button.btn.btn-default.text-white{type: "submit"}
       = icon 'fas', 'search'
-      Search
+      Search