Add rules to build the doc.

Author: emmt

.github/workflows/Documenter.yml

@@ -11,12 +11,14 @@ jobs:
   build:
     permissions:
       contents: write
+      statuses: write
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - uses: julia-actions/setup-julia@v1
         with:
           version: '1.6'
+      - uses: julia-actions/cache@v1
       - name: Install dependencies
         run: julia --project=docs/ -e 'using Pkg; Pkg.develop(PackageSpec(path=pwd())); Pkg.instantiate()'
       - name: Build and deploy