make pygments.less

Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>

searx/static/themes/simple/src/generated/pygments.less

@@ -1,6 +1,6 @@
 /*
    this file is generated automatically by searxng_extra/update/update_pygments.py
-   using pygments version 2.12.0
+   using pygments version 2.13.0
 */
 
 .code-highlight .linenos {