fix capitalization in migration

Co-authored-by: Andrew Plaza <aplaza@liquidthink.net>

Author: jakehemmerle

substrate-archive/src/migrations/20210611075511_add_column_justification.sql

@@ -1,3 +1,3 @@
 -- Add migration script here
-alter table blocks
-	add justification bytea;
+ALTER TABLE blocks
+	ADD justification bytea;