upgrade db to 5.15 (#11918)

store/sqlstore/upgrade.go

@@ -729,11 +729,9 @@ func UpgradeDatabaseToVersion514(sqlStore SqlStore) {
 }
 
 func UpgradeDatabaseToVersion515(sqlStore SqlStore) {
-	// TODO: Uncomment following condition when version 5.15.0 is released
-	// if shouldPerformUpgrade(sqlStore, VERSION_5_14_0, VERSION_5_15_0) {
-
-	// 	saveSchemaVersion(sqlStore, VERSION_5_15_0)
-	// }
+	if shouldPerformUpgrade(sqlStore, VERSION_5_14_0, VERSION_5_15_0) {
+		saveSchemaVersion(sqlStore, VERSION_5_15_0)
+	}
 }
 
 func UpgradeDatabaseToVersion516(sqlStore SqlStore) {