Update Documentation.yml

Adding DOCUMENTER_KEY

Author: sambitdash

.github/workflows/Documentation.yml

@@ -19,5 +19,6 @@ jobs:
         run: julia --project=docs/ -e 'using Pkg; Pkg.develop(PackageSpec(path=pwd())); Pkg.instantiate()'
       - name: Build and deploy
         env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }} # For authentication with GitHub Actions token
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }} # For authentication with GitHub Actions token 
+          DOCUMENTER_KEY: ${{secrets.DOCUMENTER_KEY}}
         run: julia --project=docs/ docs/make.jl