chore(deps): bump github.com/pulumi/pulumi-kubernetes/sdk/v4 in /deploy

Bumps [github.com/pulumi/pulumi-kubernetes/sdk/v4](https://github.com/pulumi/pulumi-kubernetes) from 4.19.0 to 4.21.0.
- [Release notes](https://github.com/pulumi/pulumi-kubernetes/releases)
- [Changelog](https://github.com/pulumi/pulumi-kubernetes/blob/master/CHANGELOG.md)
- [Commits](pulumi/pulumi-kubernetes@v4.19.0...v4.21.0)

---
updated-dependencies:
- dependency-name: github.com/pulumi/pulumi-kubernetes/sdk/v4
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

deploy/go.mod

@@ -4,7 +4,7 @@ go 1.23.4
 
 require (
 	github.com/ctfer-io/chall-manager v0.3.1
-	github.com/pulumi/pulumi-kubernetes/sdk/v4 v4.19.0
+	github.com/pulumi/pulumi-kubernetes/sdk/v4 v4.21.0
 	github.com/pulumi/pulumi-random/sdk/v4 v4.17.0
 	github.com/pulumi/pulumi/pkg/v3 v3.147.0
 	github.com/pulumi/pulumi/sdk/v3 v3.147.0

deploy/go.sum

@@ -381,8 +381,8 @@ github.com/pulumi/appdash v0.0.0-20231130102222-75f619a67231 h1:vkHw5I/plNdTr435
 github.com/pulumi/appdash v0.0.0-20231130102222-75f619a67231/go.mod h1:murToZ2N9hNJzewjHBgfFdXhZKjY3z5cYC1VXk+lbFE=
 github.com/pulumi/esc v0.10.0 h1:jzBKzkLVW0mePeanDRfqSQoCJ5yrkux0jIwAkUxpRKE=
 github.com/pulumi/esc v0.10.0/go.mod h1:2Bfa+FWj/xl8CKqRTWbWgDX0SOD4opdQgvYSURTGK2c=
-github.com/pulumi/pulumi-kubernetes/sdk/v4 v4.19.0 h1:7AjJpUyW6YHHpZr0bI6Fy1A3/b7ERxq1LAo5mlyNN1Y=
-github.com/pulumi/pulumi-kubernetes/sdk/v4 v4.19.0/go.mod h1:ATS+UN8pguMxypQAK+SaPewesU+UN5dpf93PNqVuHzs=
+github.com/pulumi/pulumi-kubernetes/sdk/v4 v4.21.0 h1:UedeAwQ3afL/sK0eXl1cKLnqwfu2V+TQhZCVUaNmjJE=
+github.com/pulumi/pulumi-kubernetes/sdk/v4 v4.21.0/go.mod h1:RLaX8dqvWIqDV6VjScsc1tJWp1GoZ1IDSyOPIQ/y4ps=
 github.com/pulumi/pulumi-random/sdk/v4 v4.17.0 h1:gOZeoD6h1ThtWCS53lqcBvsNNP7aJn/euKYc9V1o7+8=
 github.com/pulumi/pulumi-random/sdk/v4 v4.17.0/go.mod h1:yjpOTPppMZXoD7TamsFeV/37QybixMpTJJpzniZPKpg=
 github.com/pulumi/pulumi/pkg/v3 v3.147.0 h1:aFzP2kXBL/nPPDao625xIkjAhqT5GKe3XfPXbG07oFA=