Fix BS5 deprecated classes

Author: roland04

templates/listnotmigrated.mustache

@@ -60,10 +60,10 @@
     <div class="mt-1">
         <h3>{{#str}} settings, tool_migratehvp2h5p {{/str}}</h3>
         {{#settings}}
-            <div class="form-group">
+            <div class="mb-3">
                 <label class="form-label" for="{{name}}">{{label}}</label>
                 {{#options.0}}
-                    <select class="form-control" id="{{name}}" name="{{name}}">
+                    <select class="form-select" id="{{name}}" name="{{name}}">
                           {{#options}}<option value="{{value}}">{{text}}</option>{{/options}}
                     </select>
                 {{/options.0}}