Update dependabot.yml

Downgrade github-script

Author: Thiago C. D'Ávila

.github/workflows/dependabot.yml

@@ -11,12 +11,13 @@ jobs:
     runs-on: ubuntu-latest
     if: github.base_ref == 'master' && github.actor == 'dependabot[bot]'
     steps:
-      - uses: actions/github-script@0.9.0
+      - name: Merge
+        uses: actions/github-script@0.2.0
         with:
           github-token: ${{github.token}}
           script: |
             github.pullRequests.merge({
-              owner: context.repo.owner,
-              repo: context.repo.repo,
+              owner: context.payload.repository.owner.login,
+              repo: context.payload.repository.name,
               pull_number: context.payload.pull_request.number
             })