"Extract text" filter - improve placeholder example

changedetectionio/templates/edit.html

@@ -201,7 +201,7 @@ nav
                 </fieldset>
                 <fieldset>
                     <div class="pure-control-group">
-                        {{ render_field(form.extract_text, rows=5, placeholder="/some.regex\d{2}/ case-insensitive regex") }}
+                        {{ render_field(form.extract_text, rows=5, placeholder="\d+ online") }}
                         <span class="pure-form-message-inline">
                     <ul>
                         <li>Extracts text in the final output after other filters using regular expressions, for example <code>\d+ online</code></li>