fix: Redis 6 on Heroku breaks ActionCable config (#4269)

Heroku made some SSL/TLS changes with Redis 6, which is breaking the ActionCable configuration.
Hence providing an environment variable configuration `REDIS_OPENSSL_VERIFY_MODE` to fix that.

set the value `none` for this environment variable in your Heroku installations where breakage occurs.

fixes: #2420

lib/redis/config.rb

@@ -13,6 +13,7 @@ module Redis::Config
       {
         url: ENV.fetch('REDIS_URL', 'redis://127.0.0.1:6379'),
         password: ENV.fetch('REDIS_PASSWORD', nil).presence,
+        ssl_params: { verify_mode: Chatwoot.redis_ssl_verify_mode },
         reconnect_attempts: 2,
         network_timeout: 5
       }