fix(docs): set HUGO_ENV=production explicitly in v2 workflow

Without explicit HUGO_ENV=production, Hugo loads config/_default/params.toml
which only has a single "Latest" entry. The full version list for the
version picker lives in config/production/params.toml (maintained by
bump_doc_dependencies.py during releases). Hugo defaults to production
for builds, but being explicit matches the original hugo-build-versioned-action
and avoids any ambiguity.

jira: trivial
risk: nonprod

Author: hkad98

.github/workflows/netlify-deploy-v2.yaml

@@ -124,6 +124,8 @@ jobs:
           restore-keys: hugo-resources-
       - name: Build documentation
         working-directory: ./docs
+        env:
+          HUGO_ENV: production
         run: hugo --minify --baseURL https://www.gooddata.com/docs/python-sdk
       - name: Publish (draft)
         uses: netlify/actions/cli@master