Bump julia-actions/cache from 1 to 2 (#52)

Bumps [julia-actions/cache](https://github.com/julia-actions/cache) from 1 to 2.
- [Release notes](https://github.com/julia-actions/cache/releases)
- [Changelog](https://github.com/julia-actions/cache/blob/main/devdocs/making_a_new_release.md)
- [Commits](julia-actions/cache@v1...v2)

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

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

.github/workflows/Downgrade.yml

@@ -29,7 +29,7 @@ jobs:
         with:
           version: ${{ matrix.version }}
       - run: julia -e 'using InteractiveUtils; versioninfo(verbose=true)'
-      - uses: julia-actions/cache@v1
+      - uses: julia-actions/cache@v2
       - uses: julia-actions/julia-downgrade-compat@v1
         with:
           skip: Pkg,TOML,UUIDs

.github/workflows/ci.yml

@@ -57,7 +57,7 @@ jobs:
         with:
           version: ${{ matrix.version }}
       - run: julia -e 'using InteractiveUtils; versioninfo(verbose=true)'
-      - uses: julia-actions/cache@v1
+      - uses: julia-actions/cache@v2
       - uses: julia-actions/julia-buildpkg@v1
       - uses: julia-actions/julia-runtest@v1
       - uses: julia-actions/julia-processcoverage@v1