Bump gorm.io/driver/postgres from 1.1.1 to 1.1.2 in /tests (#4740)

Bumps [gorm.io/driver/postgres](https://github.com/go-gorm/postgres) from 1.1.1 to 1.1.2.
- [Release notes](https://github.com/go-gorm/postgres/releases)
- [Commits](go-gorm/postgres@v1.1.1...v1.1.2)

---
updated-dependencies:
- dependency-name: gorm.io/driver/postgres
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

tests/go.mod

@@ -7,7 +7,7 @@ require (
 	github.com/jinzhu/now v1.1.2
 	github.com/lib/pq v1.10.3
 	gorm.io/driver/mysql v1.1.2
-	gorm.io/driver/postgres v1.1.1
+	gorm.io/driver/postgres v1.1.2
 	gorm.io/driver/sqlite v1.1.5
 	gorm.io/driver/sqlserver v1.0.9
 	gorm.io/gorm v1.21.15