Update duration for Purring

* Fixed wrong duration time for skill SU_PURRING.

db/re/skill_cast_db.txt

@@ -1824,7 +1824,7 @@
 //-- SU_GROOMING
 5049,1000,1000,0,3000:4000:5000:6000:7000,0,60000:50000:40000:30000:20000,0
 //-- SU_PURRING
-5050,1000,1000,0,3000:4000:5000:6000:7000,0,65000:60000:55000:50000:45000,-1
+5050,1000,1000,0,7000:9000:11000:13000:15000,0,65000:60000:55000:50000:45000,-1
 //-- SU_SHRIMPARTY
 5051,3500:3000:2500:2000:1500,1000,0,12000:14000:16000:18000:20000,0,65000:60000:55000:50000:45000,-1
 //-- SU_MEOWMEOW