Merge pull request #2013 from searxng/dependabot/pip/master/redis-4.4.0

Bump redis from 4.3.5 to 4.4.0

requirements.txt

@@ -13,6 +13,6 @@ uvloop==0.17.0
 httpx-socks[asyncio]==0.7.2
 langdetect==1.0.9
 setproctitle==1.3.2
-redis==4.3.5
+redis==4.4.0
 markdown-it-py==2.1.0
 typing_extensions==4.4.0