Bump julia-actions/cache from 2 to 3

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

---
updated-dependencies:
- dependency-name: julia-actions/cache
  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/CI.yml

@@ -47,7 +47,7 @@ jobs:
         with:
           version: ${{ matrix.version }}
       - run: julia -e 'using InteractiveUtils; versioninfo(verbose=true)'
-      - uses: julia-actions/cache@v2
+      - uses: julia-actions/cache@v3
       - uses: julia-actions/julia-buildpkg@v1
       - uses: julia-actions/julia-runtest@v1
       - uses: julia-actions/julia-processcoverage@v1

.github/workflows/Downgrade.yml

@@ -37,7 +37,7 @@ jobs:
         with:
           version: ${{ matrix.version }}
       - run: julia -e 'using InteractiveUtils; versioninfo(verbose=true)'
-      - uses: julia-actions/cache@v2
+      - uses: julia-actions/cache@v3
       - uses: julia-actions/julia-downgrade-compat@v2
         with:
           skip: LinearAlgebra

.github/workflows/documentation.yml

@@ -20,7 +20,7 @@ jobs:
       - uses: julia-actions/setup-julia@v2
         with:
           version: '1.9'
-      - uses: julia-actions/cache@v2
+      - uses: julia-actions/cache@v3
       - name: Install dependencies
         run: julia --project=docs/ -e 'using Pkg; Pkg.develop(PackageSpec(path=pwd())); Pkg.instantiate()'
       - name: Build and deploy