Update github action for doc job

Author: quinnj

.github/workflows/ci.yml

@@ -1,12 +1,9 @@
 name: CI
 on:
   pull_request:
-    branches:
-      - main
   push:
-    branches:
-      - main
-    tags: '*'
+    branches: [main]
+    tags: ['*']
 jobs:
   test:
     name: Julia ${{ matrix.version }} - ${{ matrix.os }} - ${{ matrix.arch }} - ${{ github.event_name }}
@@ -53,20 +50,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
-      - uses: julia-actions/setup-julia@v1
-        with:
-          version: '1'
-      - run: |
-          julia --project=docs -e '
-            using Pkg
-            Pkg.develop(PackageSpec(path=pwd()))
-            Pkg.instantiate()'
-      - run: |
-          julia --project=docs -e '
-            using Documenter: doctest
-            using StructTypes
-            doctest(StructTypes)'
-      - run: julia --project=docs docs/make.jl
+      - uses: julia-actions/julia-buildpkg@latest
+      - uses: julia-actions/julia-docdeploy@latest
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           DOCUMENTER_KEY: ${{ secrets.DOCUMENTER_KEY }}