chore(release): bump ORB target version to 3.2.1 (#7934)

The fix commits just merged in #7931 warrant a patch bump per
scripts/orb-release-core.ts's own inferred-version logic, but the
manifest still targets 3.2.0 -- the version already promoted to
stable earlier today. Without this, orb-beta-release.yml's due check
short-circuits (targetAlreadyStable) and never cuts a beta containing
the fix.

Author: JSONbored

orb-manifest.json

@@ -1,4 +1,4 @@
 {
-  "version": "3.2.0",
+  "version": "3.2.1",
   "description": "Source of truth for the self-hostable loopover-orb container image's target release version (ghcr.io/jsonbored/loopover-selfhost). Bumped by a maintainer when a feat/fix/breaking change since the last stable orb-v tag warrants moving to a new target version -- scripts/orb-release-core.ts and .github/workflows/orb-beta-release.yml read this file to decide what version the next automated beta snapshot targets. Promoting a beta to a stable orb-vX.Y.Z release is still a manual `git tag` -- this manifest only drives the automated beta channel."
 }