[fix] disable Reddit engine by default

Reddit is enabled by default .. many bot request will go through Reddit .. we
should disable Reddit by default to cool down the IP [1].

[1] https://github.com/searxng/searxng/issues/3444#issuecomment-2180415057

Closes: https://github.com/searxng/searxng/issues/3444
Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>

searx/settings.yml

@@ -1540,6 +1540,7 @@ engines:
     engine: reddit
     shortcut: re
     page_size: 25
+    disabled: true
 
   - name: rottentomatoes
     engine: rottentomatoes