This pull request updates dependencies to newer versions and makes corresponding changes to the CI workflow to ensure compatibility. The main focus is on upgrading the Helm dependency and related tooling, as well as cleaning up and updating some Go module dependencies.

Dependency updates:

• Upgraded the helm.sh/helm/v3 dependency from v3.18.4 to v3.18.5 in go.mod.
• Updated the k8s.io/kubectl dependency from v0.33.2 to v0.33.3 in go.mod.
• Replaced the github.com/xeipuuv/gojsonschema and related indirect dependencies with github.com/santhosh-tekuri/jsonschema/v6 in go.mod.

CI workflow updates:

• Updated the Helm version used in the CI matrix from v3.18.4 to v3.18.5 in .github/workflows/ci.yaml, including all relevant matrix entries and explicit version specifications. [1] [2]