Merge pull request #2174 from searxng/dependabot/pip/master/redis-4.5.1

Bump redis from 4.4.2 to 4.5.1

requirements.txt

@@ -12,7 +12,7 @@ Brotli==1.0.9
 uvloop==0.17.0
 httpx-socks[asyncio]==0.7.2
 setproctitle==1.3.2
-redis==4.4.2
+redis==4.5.1
 markdown-it-py==2.1.0
 typing_extensions==4.4.0
 fasttext-predict==0.9.2.1