config: change RUScale default value from 5697.054498 to 1.40

Signed-off-by: disksing <i@disksing.com>

Author: disksing

config/client.go

@@ -145,7 +145,7 @@ type RUV2TiKVConfig struct {
 // Keep RUScale and the per-counter weights in sync with that fitting procedure when updating them.
 func DefaultRUV2TiKVConfig() RUV2TiKVConfig {
 	return RUV2TiKVConfig{
-		RUScale: 5697.054498,
+		RUScale: 1.40,
 
 		TiKVKVEngineCacheMiss:             0.45975389,
 		ResourceManagerWriteCntTiKV:       0.09642181,