chore(deps): update dependency python (#513)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [python](https://github.com/actions/python-versions) | uses-with | minor | `3.13` -> `3.14` |
| python | final | minor | `3.13-slim` -> `3.14-slim` |

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### Release Notes

<details>
<summary>actions/python-versions (python)</summary>

### [`v3.14.0`](https://github.com/actions/python-versions/releases/tag/3.14.0-18313368925): 3.14.0

[Compare Source](https://github.com/actions/python-versions/compare/3.13.8-18331000654...3.14.0-18313368925)

Python 3.14.0

</details>

---

### Configuration

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---

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---

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Reviewed-on: #513
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Co-committed-by: renovate[bot] <renovate-bot@git.tainton.uk>

.gitea/workflows/ci.yml

@@ -27,7 +27,7 @@ jobs:
       - name: Setup Python
         uses: actions/setup-python@v6
         with:
-          python-version: "3.13"
+          python-version: "3.14"
 
       - name: uv cache
         uses: actions/cache@v4

Dockerfile

@@ -1,4 +1,4 @@
-FROM python:3.13-slim
+FROM python:3.14-slim
 LABEL maintainer="Luke Tainton <luke@tainton.uk>"
 USER root