Use GitHub style for generated changelogs (#14)

Author: Nsttt

release-please-config.json

@@ -4,6 +4,7 @@
   "include-component-in-tag": false,
   "include-v-in-tag": false,
   "bump-minor-pre-major": true,
+  "changelog-type": "github",
   "pull-request-title-pattern": "chore: release ${version}",
   "packages": {
     "packages/tanstack": {