Try to get docs deployed (#67)

Update actions to v2

Author: ViralBShah

.github/workflows/ci.yml

@@ -60,7 +60,7 @@ jobs:
   docs:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v1.0.0
+      - uses: actions/checkout@v2
       - uses: julia-actions/setup-julia@latest
         with:
           # version: '1.6'