chore: open changeset release PRs as draft

Use the `prDraft: create` option from changesets/action to open version
PRs in draft mode, requiring explicit approval before merging.

Co-Authored-By: Claude <svc-devxp-claude@slack-corp.com>

Author: zimeg

.github/workflows/release.yml

@@ -36,9 +36,10 @@ jobs:
 
       - name: Update release PR
         id: changesets
-        uses: changesets/action@63a615b9cd06ba9a3e6d13796c7fbcb080a60a0b # v1.8.0
+        uses: changesets/action@a45c4d594aa4e2c509dc14a9f2b3b67ba3780d0d # v1.9.0
         with:
           commit: "chore: release"
+          prDraft: create
           title: "chore: release"
           version: npm run version
         env: