TECH-5070: use dummy credentials for git config

Author: madelynrr

.github/workflows/declare_schema_build.yml

@@ -21,8 +21,6 @@ jobs:
       - name: Checkout Branch
         id: checkout_branch
         uses: actions/checkout@v2
-        with:
-          token: ${{ secrets.GITHUB_TOKEN }}
       - name: Setup Ruby
         id: setup_ruby
         uses: ruby/setup-ruby@v1
@@ -40,5 +38,7 @@ jobs:
         id: appraisals
         run: |
           bundle install --jobs=3 --retry=3 --path=${BUNDLE_PATH:-vendor/bundle} --gemfile=${{ matrix.gemfile }}
+          git config user.email "[email protected]"
+          git config user.name "dummy"
           bundle exec rake test:prepare_testapp[force]
           bundle exec rake test:all < test_responses.txt