chore: fix migration script for sqlite

store/migration/sqlite/0.24/00__memo.sql

--- Drop deprecated tags column.
-ALTER TABLE memo DROP COLUMN tags;
-
 -- Remove deprecated indexes.
+DROP INDEX IF EXISTS idx_memo_tags;
 DROP INDEX IF EXISTS idx_memo_content;
-DROP INDEX IF EXISTS idx_memo_visibility;
+DROP INDEX IF EXISTS idx_memo_visibility;
\ No newline at end of file
+
+-- Drop deprecated tags column.
+ALTER TABLE memo DROP COLUMN tags;
\ No newline at end of file