Update CI.yml to setup-julia-v3 (#317)

Author: juliohm

.github/workflows/CI.yml

@@ -26,7 +26,7 @@ jobs:
           - windows-latest
     steps:
       - uses: actions/checkout@v6
-      - uses: julia-actions/setup-julia@v2
+      - uses: julia-actions/setup-julia@v3
         with:
           version: ${{ matrix.version }}
       - uses: actions/cache@v5
@@ -52,7 +52,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v6
-      - uses: julia-actions/setup-julia@v2
+      - uses: julia-actions/setup-julia@v3
         with:
           version: '1'
       - uses: julia-actions/julia-buildpkg@v1