filer: fix mysql command to upsert

weed/command/scaffold/filer.toml

@@ -61,7 +61,7 @@ connection_max_lifetime_seconds = 0
 interpolateParams = false
 # if insert/upsert failing, you can disable upsert or update query syntax to match your RDBMS syntax:
 enableUpsert = true
-upsertQuery = """INSERT INTO ` + "`%s`" + ` (dirhash,name,directory,meta) VALUES(?,?,?,?) ON DUPLICATE KEY UPDATE meta = VALUES(meta)"""
+upsertQuery = """INSERT INTO `%s` (dirhash,name,directory,meta) VALUES(?,?,?,?) ON DUPLICATE KEY UPDATE meta = VALUES(meta)"""
 
 [mysql2]  # or memsql, tidb
 enabled = false
@@ -85,7 +85,7 @@ connection_max_lifetime_seconds = 0
 interpolateParams = false
 # if insert/upsert failing, you can disable upsert or update query syntax to match your RDBMS syntax:
 enableUpsert = true
-upsertQuery = """INSERT INTO ` + "`%s`" + ` (dirhash,name,directory,meta) VALUES(?,?,?,?) ON DUPLICATE KEY UPDATE meta = VALUES(meta)"""
+upsertQuery = """INSERT INTO `%s` (dirhash,name,directory,meta) VALUES(?,?,?,?) ON DUPLICATE KEY UPDATE meta = VALUES(meta)"""
 
 [postgres] # or cockroachdb, YugabyteDB
 # CREATE TABLE IF NOT EXISTS filemeta (