Update settings.yml

Changed value of "extra_proxy_timeout" from 10.0 to 10 as the variable expects an int.
Uncommenting this value with a non-int value will throw many errors and crash all engines.

searx/settings.yml

@@ -192,7 +192,7 @@ outgoing:
   #
   # Extra seconds to add in order to account for the time taken by the proxy
   #
-  #  extra_proxy_timeout: 10.0
+  #  extra_proxy_timeout: 10
   #
   # uncomment below section only if you have more than one network interface
   # which can be the source of outgoing search requests