Update ci.yml

Author: amontoison

.github/workflows/ci.yml

@@ -40,7 +40,7 @@ jobs:
             allow_failure: true
     steps:
       - uses: actions/checkout@v2
-      - uses: julia-actions/setup-julia@v1
+      - uses: julia-actions/setup-julia@v2
         with:
           version: ${{ matrix.version }}
           arch: ${{ matrix.arch }}