docs(release): point changelog check B at the Talos installer profile (#4959)

## What this PR does

Check B loops over three values files and the first one,
`packages/core/talos/values.yaml`, is an empty file, so nothing is ever
printed for Talos. Talos version is `version` in
`packages/core/talos/images/talos/profiles/installer.yaml` (package
Makefile reads it as `TALOS_VERSION`), this PR points the loop there.

I ran old and new loop on real tags. On `v1.5.4..v1.6.0` the Talos bump
from `v1.13.0` to `v1.13.6` was not shown before and is shown now, on
`v1.6.1..v1.6.2` and `v1.6.4..v1.6.5` output is the same.

Found it while reviewing #4952, which fixes the Dockerfile pathspec
right below the loop. The two PRs merge cleanly in any order. I left
`head -40` alone, it also hides the new `talos.version` block of
`packages/apps/kubernetes/values.yaml` on `v1.5.4..v1.6.0`, but that is
a separate decision.

### Screenshots

N/A: documentation-only change, no UI impact.

### Downstream repositories

- [x] No downstream repository is affected by this change
- [ ] [cozystack/website](https://github.com/cozystack/website) -
follow-up:
- [ ]
[cozystack/terraform-provider-cozystack](https://github.com/cozystack/terraform-provider-cozystack)
- follow-up:
- [ ]
[cozystack/ansible-cozystack](https://github.com/cozystack/ansible-cozystack)
- follow-up:
- [ ] [cozystack/ccp](https://github.com/cozystack/ccp) - follow-up:
- [ ] [cozystack/talm](https://github.com/cozystack/talm) - follow-up:
- [ ] [cozystack/cozyhr](https://github.com/cozystack/cozyhr) -
follow-up:
- [ ] [cozystack/cozy-proxy](https://github.com/cozystack/cozy-proxy) -
follow-up:
- [ ]
[cozystack/cozystack-telemetry-server](https://github.com/cozystack/cozystack-telemetry-server)
- follow-up:
- [ ]
[cozystack/external-apps-example](https://github.com/cozystack/external-apps-example)
- follow-up:
- [ ] [cozystack/examples](https://github.com/cozystack/examples) -
follow-up:
- [ ] [cozystack/community](https://github.com/cozystack/community) -
follow-up:

### Release note

```release-note
docs(release): point changelog check B at the Talos installer profile, a Talos version bump was not shown by it before
```


<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

* **Chores**
* Updated changelog verification to check the installer configuration;
checks for installer and Kubernetes values remain unchanged.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

docs/release.md

@@ -540,7 +540,7 @@ git diff --name-only $PREV..$NEW -- 'packages/*/charts/*/Chart.yaml' 'packages/*
 done
 
 # B. Out-of-Chart.yaml pins (Talos, tenant K8s, vendored images)
-for path in packages/core/talos/values.yaml packages/core/installer/values.yaml packages/apps/kubernetes/values.yaml; do
+for path in packages/core/talos/images/talos/profiles/installer.yaml packages/core/installer/values.yaml packages/apps/kubernetes/values.yaml; do
   git diff $PREV..$NEW -- "$path" | head -40
 done
 git diff --name-only $PREV..$NEW -- 'images/*/Dockerfile'