chore(ci): match changeset-release/ prefix in changeset-check skip

Per review (Codacy): the changesets bot branches as
changeset-release/<baseBranch>, so use
!startsWith(github.head_ref, 'changeset-release/') instead of an exact
match on 'changeset-release/main'. Same behavior for this repo today,
but robust to other base branches.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: alerizzo

.github/workflows/ci.yml

@@ -41,7 +41,8 @@ jobs:
   changeset-check:
     # Skip the changesets bot's "version packages" PR: it consumes (deletes)
     # changesets rather than adding them, so it would always fail this check.
-    if: github.event_name == 'pull_request' && github.head_ref != 'changeset-release/main'
+    # The bot branches as changeset-release/<baseBranch>, so match the prefix.
+    if: github.event_name == 'pull_request' && !startsWith(github.head_ref, 'changeset-release/')
     runs-on: ubuntu-latest
 
     steps: