Add a link to the search page in popup settings

Add link to search page in popup settings

<rikaitan.link>YWFkMDExYjQ5NTY5OTEzMDViOTJkZTE3MzljZmIzYjY3MDlmMTNlYgo=</rikaitan.link>

ext/settings.html

@@ -563,7 +563,7 @@ <h1>Rikaitan Settings</h1>
         <div class="settings-item"><div class="settings-item-inner">
             <div class="settings-item-left">
                 <div class="settings-item-label">Allow scanning search page content</div>
-                <div class="settings-item-description">Text on the search page can be scanned for definitions, which will open a popup.</div>
+                <div class="settings-item-description">Text on the <a href="/search.html" target="_blank" rel="noopener">search page</a> can be scanned for definitions, which will open a popup.</div>
             </div>
             <div class="settings-item-right">
                 <label class="toggle"><input type="checkbox" data-setting="scanning.enableOnSearchPage"><span class="toggle-body"><span class="toggle-track"></span><span class="toggle-knob"></span></span></label>