Run CompatHelper with must recent Julia release

Author: sethaxen

.github/workflows/CompatHelper.yml

@@ -8,6 +8,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
+      - uses: julia-actions/setup-julia@v1
+        with:
+          version: 1
+          arch: ${{ runner.arch }}
       - name: Pkg.add("CompatHelper")
         run: julia -e 'using Pkg; Pkg.add("CompatHelper")'
       - name: CompatHelper.main()