Bump kachick/selfup from 1.1.3 to 1.1.6 (#958)

Bumps [kachick/selfup](https://github.com/kachick/selfup) from 1.1.3 to 1.1.6.
- [Release notes](https://github.com/kachick/selfup/releases)
- [Changelog](https://github.com/kachick/selfup/blob/main/.goreleaser.yaml)
- [Commits](kachick/selfup@v1.1.3...v1.1.6)

---
updated-dependencies:
- dependency-name: kachick/selfup
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

.github/workflows/update-nixpkgs-and-versions-in-ci.yml

@@ -11,7 +11,7 @@ on:
 
 jobs:
   update-nixpkgs:
-    uses: kachick/selfup/.github/workflows/[email protected].3
+    uses: kachick/selfup/.github/workflows/[email protected].6
     with:
       app_id: ${{ vars.APP_ID }}
       dry-run: ${{ github.event_name == 'pull_request' }}