Update MM version/sqlstore to version 6.0.0 (#18247)

Automatic Merge

model/version.go

@@ -13,6 +13,7 @@ import (
 // It should be maintained in chronological order with most current
 // release at the front of the list.
 var versions = []string{
+	"6.0.0",
 	"5.38.0",
 	"5.37.0",
 	"5.36.0",

store/sqlstore/upgrade.go

@@ -20,6 +20,7 @@ import (
 
 const (
 	CurrentSchemaVersion   = Version5380
+	Version600             = "6.0.0"
 	Version5380            = "5.38.0"
 	Version5370            = "5.37.0"
 	Version5360            = "5.36.0"