Bump julia-actions/setup-julia from 1 to 3

Bumps [julia-actions/setup-julia](https://github.com/julia-actions/setup-julia) from 1 to 3.
- [Release notes](https://github.com/julia-actions/setup-julia/releases)
- [Commits](julia-actions/setup-julia@v1...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>

Author: dependabot[bot]

.github/workflows/readme_listings.yml

@@ -33,7 +33,7 @@ jobs:
       - run: python -c "import pytest_codeblocks; code=pytest_codeblocks.extract_from_file('README.md'); f=open('readme.jl', 'w'); f.writelines(block.code for block in code if block.syntax=='Julia'); f.close()"
       - run: cat -n readme.jl
 
-      - uses: julia-actions/setup-julia@v1
+      - uses: julia-actions/setup-julia@v3
       - run: mkdir readme_output
       - run: julia readme.jl > readme_output/julia.txt
       - uses: actions/upload-artifact@v4