Modify username column in t2 table

Remove NOT NULL constraint from username column

Author: adela-bytebase

migrations-semver/1.0.2_create_t2.sql

@@ -1,4 +1,4 @@
 CREATE TABLE "public"."t2" (
   "id" serial PRIMARY KEY,
-  "username" text NOT NULL
+  "username" text
 )