fix(deps): update dependency astroid to <=4.0.3 (#543)

This PR contains the following updates:

| Package | Change | [Age](https://docs.renovatebot.com/merge-confidence/) | [Confidence](https://docs.renovatebot.com/merge-confidence/) |
|---|---|---|---|
| [astroid](https://github.com/pylint-dev/astroid) | `<=4.0.2` → `<=4.0.3` | ![age](https://developer.mend.io/api/mc/badges/age/pypi/astroid/4.0.3?slim=true) | ![confidence](https://developer.mend.io/api/mc/badges/confidence/pypi/astroid/4.0.2/4.0.3?slim=true) |

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### Release Notes

<details>
<summary>pylint-dev/astroid (astroid)</summary>

### [`v4.0.3`](https://github.com/pylint-dev/astroid/blob/HEAD/ChangeLog#Whats-New-in-astroid-403)

[Compare Source](https://github.com/pylint-dev/astroid/compare/v4.0.2...v4.0.3)

\============================
Release date: 2026-01-03

- Fix inference of `IfExp` (ternary expression) nodes to avoid prematurely narrowing
  results in the face of inference ambiguity.

  Closes [#&#8203;2899](https://github.com/pylint-dev/astroid/issues/2899)

- Fix base class inference for dataclasses using the PEP 695 typing syntax.

  Refs [pylint-dev/pylint#10788](https://github.com/pylint-dev/pylint/issues/10788)

</details>

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Reviewed-on: https://git.tainton.uk/repos/webexmemebot/pulls/543
Co-authored-by: renovate[bot] <renovate-bot@git.tainton.uk>
Co-committed-by: renovate[bot] <renovate-bot@git.tainton.uk>

pyproject.toml

@@ -10,7 +10,7 @@ requires-python = "<3.14,>=3.11"
 dependencies = [
     "webex-bot<1.1.0,>=1.0.3",
     "pillow<12.1.1,>=12.1.0",
-    "astroid<=4.0.2",
+    "astroid<=4.0.3",
 ]
 
 [dependency-groups]