chore(deps): bump julia-actions/install-juliaup from 2 to 3 (#170)

Bumps [julia-actions/install-juliaup](https://github.com/julia-actions/install-juliaup) from 2 to 3.
- [Release notes](https://github.com/julia-actions/install-juliaup/releases)
- [Commits](julia-actions/install-juliaup@v2...v3)

---
updated-dependencies:
- dependency-name: julia-actions/install-juliaup
  dependency-version: '3'
  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.yml

@@ -14,7 +14,7 @@ jobs:
         os: [ubuntu-latest]
     steps:
       - uses: actions/checkout@v6
-      - uses: julia-actions/install-juliaup@v2
+      - uses: julia-actions/install-juliaup@v3
         with:
            channel: ${{matrix.channel}}
       - uses: julia-actions/cache@v2