Don't change CI version for documentation

Author: darsnack

.github/workflows/ci.yml

@@ -52,7 +52,7 @@ jobs:
       - uses: actions/checkout@v2
       - uses: julia-actions/setup-julia@v1
         with:
-          version: '1'
+          version: '1.6'
       - run: |
           julia --project=docs -e '
             using Pkg