chore(deps): bump sigstore/cosign-installer in the ci-dependencies group

Bumps the ci-dependencies group with 1 update: [sigstore/cosign-installer](https://github.com/sigstore/cosign-installer).


Updates `sigstore/cosign-installer` from 3.8.2 to 3.9.0
- [Release notes](https://github.com/sigstore/cosign-installer/releases)
- [Commits](https://github.com/sigstore/cosign-installer/compare/v3.8.2...v3.9.0)

---
updated-dependencies:
- dependency-name: sigstore/cosign-installer
  dependency-version: 3.9.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: ci-dependencies
...

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

content/links/Itsycal for Mac.md

@@ -1,8 +0,0 @@
----
-title: Mowglii Itsycal for Mac
-source: https://www.mowglii.com/itsycal/
-tags:
-  - links
-  - apps
----
-A lovely small calendar for the Mac that sits in your toolbar. [Itsycal](https://www.mowglii.com/itsycal/)

content/links/Nothing.tech.md

@@ -1,8 +0,0 @@
----
-title: Nothing.tech
-source: https://us.nothing.tech/
-tags:
-  - links
-  - tech
----
-Beautifully designed phones, audio, and tech accessories. [Nothing](https://nothing.tech/)