Update docs.yml to build docs with --color (#628)

Author: odow

.github/workflows/docs.yml

@@ -37,7 +37,7 @@ jobs:
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }} # For authentication with GitHub Actions token
           DOCUMENTER_KEY: ${{ secrets.DOCUMENTER_KEY }} # For authentication with SSH deploy key
-        run: julia --project=docs/ docs/make.jl
+        run: julia --color=yes --project=docs/ docs/make.jl
       - uses: errata-ai/vale-action@reviewdog
         with:
           version: 3.0.5