update min_redis_pack_version to 5.5

Author: gkorland

ramp.yml

@@ -6,7 +6,7 @@ homepage: https://oss.redislabs.com/redisai/
 license: GNU Affero General Public License v3.0
 command_line_args: ""
 min_redis_version: "5.0"
-min_redis_pack_version: "5.4"
+min_redis_pack_version: "5.5"
 capabilities:
     - types
     - no_multi_key