Apply prettier to migrate-to-v1beta1.mdx

The skill sandbox blocked npm run prettier, so formatting drift
landed on CI. Running prettier --write against the file flagged by
the Lint and format checks job.

Workflow-side fix (auto-run prettier after skill commits) follows in
a separate PR.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: rdimitrov

docs/toolhive/guides-k8s/migrate-to-v1beta1.mdx

@@ -6,9 +6,9 @@ description:
 ---
 
 The ToolHive Kubernetes Operator has undergone a series of CRD API changes
-leading up to the `v1beta1` API version promotion in v0.23.0. These changes
-span releases v0.15.0 through v0.23.0, each introducing breaking changes that
-require manifest and tooling updates.
+leading up to the `v1beta1` API version promotion in v0.23.0. These changes span
+releases v0.15.0 through v0.23.0, each introducing breaking changes that require
+manifest and tooling updates.
 
 This guide covers every breaking change in order, so you can start from
 whichever version you are currently running and work forward.