Bump julia-actions/setup-julia from 2 to 3 (#156)

* Bump julia-actions/setup-julia from 2 to 3

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

---
updated-dependencies:
- dependency-name: julia-actions/setup-julia
  dependency-version: '3'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

* Modify CI workflow architecture settings

Updated architecture matrix to use 'default' and removed specific tests for 32-bit Linux and Apple M-series.

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Oscar Dowson <odow@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -17,19 +17,14 @@ jobs:
       matrix:
         version: ['1.10', '1']
         os: [ubuntu-latest, macOS-latest, windows-latest]
-        arch: [x64]
+        arch: [default]
         include:
-          # Also test against 32-bit Linux on LTS.
           - version: '1'
             os: ubuntu-latest
             arch: x86
-          # Test against Apple M-series
-          - version: '1'
-            os: macos-14
-            arch: aarch64
     steps:
       - uses: actions/checkout@v6
-      - uses: julia-actions/setup-julia@v2
+      - uses: julia-actions/setup-julia@v3
         with:
           version: ${{ matrix.version }}
           arch: ${{ matrix.arch }}