[oscar] add scrolling="no" to iframes in HTML templates

Suggested-by: @dalf https://github.com/searxng/searxng/pull/882#discussion_r805180787
Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>

searx/templates/oscar/result_templates/default.html

@@ -9,7 +9,7 @@
 
 {% if result.data_src -%}
 <div id="result-media-{{ index }}" class="embedded-content invisible">
-  <iframe data-src="{{result.data_src}}" frameborder="0" allowfullscreen></iframe>
+  <iframe data-src="{{result.data_src}}" frameborder="0" scrolling="no" allowfullscreen></iframe>
 </div>
 {%- endif -%}
 

searx/templates/oscar/result_templates/videos.html

@@ -9,7 +9,7 @@
 
 {% if result.data_src -%}
 <div id="result-video-{{ index }}" class="embedded-video collapse">
-  <iframe data-src="{{result.data_src}}" width="540" height="304" frameborder="0" allowfullscreen></iframe>
+  <iframe data-src="{{result.data_src}}" width="540" height="304" frameborder="0" scrolling="no" allowfullscreen></iframe>
 </div>
 {%- endif %}