bugfix(lru_put): MRU flag argument index

New argument `field_tts` added:

- Change the index for the MRU flag argument from ARGV[6] to ARGV[7]
- Update the condition to check if #ARGV > 6 instead of #ARGV > 5

Author: tanbro

src/redis_func_cache/lua/lru_put.lua

@@ -26,8 +26,8 @@ if tonumber(ttl) > 0 then
 end
 
 local is_mru = false
-if #ARGV > 5 then
-    is_mru = (ARGV[6] == 'mru')
+if #ARGV > 6 then
+    is_mru = (ARGV[7] == 'mru')
 end
 
 local c = 0