Fix URL provided by documentation-links.yml (#151)

Author: rffontenelle

.github/workflows/documentation-links.yml

@@ -22,3 +22,5 @@ jobs:
       - uses: readthedocs/actions/preview@v1
         with:
           project-slug: "python-docs-transifex-automation"
+          single-version: "true"
+          single-language: "true"