Bump helm.sh/helm/v3 from 3.14.4 to 3.15.2 (#663)

* Bump helm.sh/helm/v3 from 3.14.4 to 3.15.2

Bumps [helm.sh/helm/v3](https://github.com/helm/helm) from 3.14.4 to 3.15.2.
- [Release notes](https://github.com/helm/helm/releases)
- [Commits](helm/helm@v3.14.4...v3.15.2)

---
updated-dependencies:
- dependency-name: helm.sh/helm/v3
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

* tidy module

Signed-off-by: David J. M. Karlsen <david@davidkarlsen.com>

---------

Signed-off-by: dependabot[bot] <support@github.com>
Signed-off-by: David J. M. Karlsen <david@davidkarlsen.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: David J. M. Karlsen <david.johan.macdonald.karlsen@dnb.no>

go.mod

@@ -1,6 +1,8 @@
 module github.com/helm/chart-testing/v3
 
-go 1.22
+go 1.22.0
+
+toolchain go1.22.4
 
 require (
 	github.com/MakeNowJust/heredoc v1.0.0
@@ -14,7 +16,7 @@ require (
 	github.com/spf13/viper v1.19.0
 	github.com/stretchr/testify v1.9.0
 	gopkg.in/yaml.v2 v2.4.0
-	helm.sh/helm/v3 v3.14.4
+	helm.sh/helm/v3 v3.15.2
 )
 
 require (

go.sum

@@ -110,5 +110,5 @@ gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
-helm.sh/helm/v3 v3.14.4 h1:6FSpEfqyDalHq3kUr4gOMThhgY55kXUEjdQoyODYnrM=
-helm.sh/helm/v3 v3.14.4/go.mod h1:Tje7LL4gprZpuBNTbG34d1Xn5NmRT3OWfBRwpOSer9I=
+helm.sh/helm/v3 v3.15.2 h1:/3XINUFinJOBjQplGnjw92eLGpgXXp1L8chWPkCkDuw=
+helm.sh/helm/v3 v3.15.2/go.mod h1:FzSIP8jDQaa6WAVg9F+OkKz7J0ZmAga4MABtTbsb9WQ=