build(deps): bump github.com/kunitsucom/util.go

Bumps [github.com/kunitsucom/util.go](https://github.com/kunitsucom/util.go) from 0.0.60-rc.2 to 0.0.60-rc.6.
- [Release notes](https://github.com/kunitsucom/util.go/releases)
- [Commits](kunitsucom/util.go@v0.0.60-rc.2...v0.0.60-rc.6)

---
updated-dependencies:
- dependency-name: github.com/kunitsucom/util.go
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

go.mod

@@ -2,4 +2,4 @@ module github.com/kunitsucom/ddlgen
 
 go 1.21.4
 
-require github.com/kunitsucom/util.go v0.0.60-rc.2
+require github.com/kunitsucom/util.go v0.0.60-rc.6

go.sum

@@ -1,2 +1,2 @@
-github.com/kunitsucom/util.go v0.0.60-rc.2 h1:seO7K8Kkj2rIBmlNhjl8Wh+XohQJCs1u5B27I0q+KRo=
-github.com/kunitsucom/util.go v0.0.60-rc.2/go.mod h1:bYFf2JvRqVF1brBtpdt3xkkTGJBxmYBxZlItrc/lf7Y=
+github.com/kunitsucom/util.go v0.0.60-rc.6 h1:aiyBwQzzqxzQzWz5fZCMoj1bOWPA7iAVgju85/zXmA8=
+github.com/kunitsucom/util.go v0.0.60-rc.6/go.mod h1:bYFf2JvRqVF1brBtpdt3xkkTGJBxmYBxZlItrc/lf7Y=