doc: Add gateway sync to release actions

Author: benolayinka

.github/workflows/release.yml

@@ -77,3 +77,5 @@ jobs:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           BRANCH: gh-pages
           FOLDER: public
+      - name: Sync gateways.csv to airtable
+        run: go run frontmatter.go && curl -X POST https://api.airtable.com/v0/appmHY8YWHezjXw7e/tblztR9GgiUDUnxoE/sync/GlJQQXay -H "Authorization: Bearer ${AIRTABLE_GATEWAYS_API_KEY}" -H "Content-Type: text/csv" --data-binary "@gateways.csv"