chore(deps): Bump pulumi/actions from 4 to 6 (#20)

Bumps [pulumi/actions](https://github.com/pulumi/actions) from 4 to 6.
- [Release notes](https://github.com/pulumi/actions/releases)
- [Changelog](https://github.com/pulumi/actions/blob/main/CHANGELOG.md)
- [Commits](pulumi/actions@v4...v6)

---
updated-dependencies:
- dependency-name: pulumi/actions
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/ci.yaml

@@ -32,7 +32,7 @@ jobs:
         with:
           repo: pulumi/pulumictl
       - name: Install pulumi
-        uses: pulumi/actions@v4
+        uses: pulumi/actions@v6
       - name: Install Go Tools
         uses: ./.github/actions/gotools
         with: