Bump Whisper.net.Runtime.CoreML from 1.7.4 to 1.8.1

[dependabot]

Updated Whisper.net.Runtime.CoreML from 1.7.4 to 1.8.1.

Release notes

Sourced from Whisper.net.Runtime.CoreML's releases.

1.8.1

Fixes

This release represents 2 small fixes for:

• NoAVX Runtime was missing artifact on Windows
• Vulkan Runtime was crashing caused by stack overflow on some hardware

Changelog

• Preparing 1.8.1 by @​sandrohanea in Preparing 1.8.1 sandrohanea/whisper.net#370
• Fixed vulkan build to remove GGML_VULKAN_COOPMAT_GLSLC_SUPPORT definition by @​sandrohanea in Fixed vulkan build to remove GGML_VULKAN_COOPMAT_GLSLC_SUPPORT definition sandrohanea/whisper.net#373

Full Changelog: sandrohanea/whisper.net@1.8.0...1.8.1

1.8.0

Whisper.net 1.8.0 brings numerous improvements, breaking changes, and enhanced developer experience. Buckle up — this one's big.

---

🔁 Versioning Change

Whisper.net follows semantic versioning.

Starting from version `1.8.0`, Whisper.net no longer mirrors the versioning of `whisper.cpp`, which now uses commit-based versions (e.g., b2254, b2255).

To identify the `whisper.cpp` version used in a Whisper.net release, check the `whisper.cpp` submodule. The commit hash in the release tag maps directly to the `whisper.cpp` version.

---

🛠 Breaking Changes

📦 WhisperGgmlDownloader is now instantiable

• No longer static. Introduced a WhisperGgmlDownloader.Default instance for default usage.
• Allows injecting custom HttpClient for authenticated/controlled requests (e.g., Hugging Face tokens).

Old usage:

await WhisperGgmlDownloader.GetGgmlModelAsync(...);

New usage:

await WhisperGgmlDownloader.Default.GetGgmlModelAsync(...);

---

🧠 WhisperLogLevel Reordered

// Old
None = 0,
Info = 1,
Warning = 2,
Error = 3,
Debug = 4,
Cont = 5

// New
 ... (truncated)

Commits viewable in [compare view](https://github.com/sandrohanea/whisper.net/compare/1.7.4...1.8.1).
</details>

[![Dependabot compatibility score](https://dependabot-badges.githubapp.com/badges/compatibility_score?dependency-name=Whisper.net.Runtime.CoreML&package-manager=nuget&previous-version=1.7.4&new-version=1.8.1)](https://docs.github.com/en/github/managing-security-vulnerabilities/about-dependabot-security-updates#about-compatibility-scores)

You can trigger a rebase of this PR by commenting `@dependabot rebase`.

[//]: # (dependabot-automerge-start)
[//]: # (dependabot-automerge-end)

---

<details>
<summary>Dependabot commands and options</summary>
<br />

You can trigger Dependabot actions by commenting on this PR:
- `@dependabot rebase` will rebase this PR
- `@dependabot recreate` will recreate this PR, overwriting any edits that have been made to it
- `@dependabot merge` will merge this PR after your CI passes on it
- `@dependabot squash and merge` will squash and merge this PR after your CI passes on it
- `@dependabot cancel merge` will cancel a previously requested merge and block automerging
- `@dependabot reopen` will reopen this PR if it is closed
- `@dependabot close` will close this PR and stop Dependabot recreating it. You can achieve the same result by closing it manually
- `@dependabot show <dependency name> ignore conditions` will show all of the ignore conditions of the specified dependency
- `@dependabot ignore this major version` will close this PR and stop Dependabot creating any more for this major version (unless you reopen the PR or upgrade to it yourself)
- `@dependabot ignore this minor version` will close this PR and stop Dependabot creating any more for this minor version (unless you reopen the PR or upgrade to it yourself)
- `@dependabot ignore this dependency` will close this PR and stop Dependabot creating any more for this dependency (unless you reopen the PR or upgrade to it yourself)


</details>

> **Note**
> Automatic rebases have been disabled on this pull request as it has been open for over 30 days.