Tighten v0.23.0 migration and redirectUri sections

Apply editorial fixes from docs-review pass: replace spaced-hyphen
separators in prose with natural punctuation, soften the v1alpha1
removal commitment to match the release notes' 'future release'
phrasing, and correct 'v1beta1 API group' to just 'v1beta1' since
v1beta1 is a version under the toolhive.stacklok.dev API group.

Co-authored-by: Radoslav Dimitrov <undefined@users.noreply.github.com>

Author: github-actions[bot]

docs/toolhive/guides-k8s/auth-k8s.mdx

@@ -832,7 +832,7 @@ upstreamProviders:
         key: client-secret
 ```
 
-Whichever value ends up in effect - defaulted or explicit - must exactly match
+The effective redirect URI, whether defaulted or explicit, must exactly match
 the redirect URI registered with the upstream identity provider.
 
 ## Set up authorization

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

@@ -724,7 +724,7 @@ VirtualMCPServer.
 
 :::info[No schema changes]
 
-The `v1alpha1` and `v1beta1` schemas are identical - `v1alpha1` is a
+The `v1alpha1` and `v1beta1` schemas are identical. `v1alpha1` is a
 deprecation-only passthrough that reuses the `v1beta1` types. The CRDs use the
 default `None` conversion strategy, so no conversion webhook is required and
 existing resources continue to work unchanged after the upgrade.
@@ -749,17 +749,16 @@ Migration steps:
    ```
 
 3. Re-apply the updated manifests. Because both versions are still served, you
-   can update resources incrementally - deprecation warnings call out each
+   can update resources incrementally. Deprecation warnings call out each
    manifest that still uses `v1alpha1`:
 
    ```bash
    kubectl apply -f my-mcpserver.yaml
    ```
 
 4. Update any client tooling, Helm charts, GitOps repositories, and generated
-   typed clients to reference the `v1beta1` API group. After all resources have
-   been re-applied, `kubectl get <resource>` returns `v1beta1` objects from
-   etcd.
+   typed clients to reference `v1beta1`. After all resources have been
+   re-applied, `kubectl get <resource>` returns `v1beta1` objects from etcd.
 
 :::tip[Identify lingering `v1alpha1` usage]
 
@@ -770,8 +769,8 @@ surfaces in `kubectl` output.
 
 :::
 
-`v1alpha1` will remain served for at least one additional minor release before
-being removed; update now to avoid a forced migration later.
+`v1alpha1` will be removed in a future release; update now to avoid a forced
+migration later.
 
 ## Next steps