ci: add changelog type to release please config (#82)

Author: lhoupert

release-please-config.json

@@ -3,6 +3,7 @@
     ". ": {
       "release-type": "python",
       "package-name": "data-pipeline",
+      "changelog-type": "github",
       "changelog-sections": [
         { "type": "feat", "section": "Features", "hidden": false },
         { "type": "fix", "section": "Bug Fixes", "hidden": false },