Bump julia-actions/cache from 2 to 3 (#211)

Author: dependabot[bot]

.github/workflows/CI.yml

@@ -28,7 +28,7 @@ jobs:
         with:
           version: ${{ matrix.version }}
           arch: ${{ matrix.arch }}
-      - uses: julia-actions/cache@v2
+      - uses: julia-actions/cache@v3
       - uses: julia-actions/julia-buildpkg@v1
       - uses: julia-actions/julia-runtest@v1
         with:
@@ -50,7 +50,7 @@ jobs:
       - uses: julia-actions/setup-julia@v2
         with:
           version: '1.11'
-      - uses: julia-actions/cache@v2
+      - uses: julia-actions/cache@v3
       - name: Install dependencies
         run: julia --project=docs/ -e 'using Pkg; Pkg.Registry.update(); Pkg.develop(PackageSpec(path=pwd())); Pkg.instantiate()'
       - name: Build and deploy