[mod] favicons: simplify RTL in template & CSS

Comes from a sughgestion in:

- https://github.com/searxng/searxng/pull/3727#issuecomment-2388998803

Suggested-by: Bnyro <bnyro@tutanota.com>
Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>

searx/static/themes/simple/src/less/style-rtl.less

@@ -94,12 +94,12 @@
   direction: initial;
   text-align: right;
 
+  .result .url_header {
+    direction: rtl;
+  }
+
   .result .url_wrapper {
     justify-content: end;
-
-    .favicon {
-      margin: 0 0 0 8px;
-    }
   }
 }