Revert "refactor(CI): Remove the unnecessary doc configuration"

This reverts commit 6f70ea1.

Author: kunzaatko

.github/workflows/Documenter.yml

@@ -27,6 +27,12 @@ jobs:
         with:
           version: '1'
       - uses: julia-actions/cache@v2
+      - name: Configure doc environment
+        shell: julia --project=docs --color=yes {0}
+        run: |
+          using Pkg
+          Pkg.develop(PackageSpec(path=pwd()))
+          Pkg.instantiate()
       - uses: julia-actions/julia-buildpkg@v1
       - run: julia --project=docs docs/make.jl
         env: