ci: use actions/cache@v4 (#1140)

Author: vitornesello

.github/workflows/ci.yml

@@ -27,7 +27,7 @@ jobs:
           version: ${{ matrix.version }}
           arch: ${{ matrix.arch }}
       - run: julia --project=@. -e 'using Pkg; Pkg.add(PackageSpec(url="https://github.com/atoptima/ColunaDemos.jl.git"));'
-      - uses: actions/cache@v1
+      - uses: actions/cache@v4
         env:
           cache-name: cache-artifacts
         with: