Registrator.jl needs GITHUB_TOKEN for the test suite

Author: DilumAluthge

.github/workflows/downstream_packages.yml

@@ -46,6 +46,8 @@ jobs:
           path: downstream
       - name: Load this and run the downstream tests
         shell: julia --color=yes --project=downstream {0}
+        env:
+          GITHUB_TOKEN: ${{ (matrix.package.repo == "Registrator.jl") && secrets.GITHUB_TOKEN || "" }}
         run: |
           using Pkg
           try