Update halfshot/matrix-hookshot Docker tag to v7.2.0 (#1737)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [halfshot/matrix-hookshot](https://github.com/matrix-org/matrix-hookshot) | minor | `7.1.0` -> `7.2.0` |

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### Release Notes

<details>
<summary>matrix-org/matrix-hookshot (halfshot/matrix-hookshot)</summary>

### [`v7.2.0`](https://github.com/matrix-org/matrix-hookshot/blob/HEAD/CHANGELOG.md#720-2025-10-10)

[Compare Source](https://github.com/matrix-org/matrix-hookshot/compare/7.1.0...7.2.0)

##### Features

- Add configuration option for generic webhooks to configure maximum request body size limit, increase default to 1mb from default 100kb. ([#&#8203;1090](https://github.com/matrix-org/matrix-hookshot/issues/1090))

##### Bugfixes

- Fix a bug where users may fail to be registered with a `IO.ELEMENT.MSC4190.M_APPSERVICE_LOGIN_UNSUPPORTED` error when `MSC4190` is enabled on the homeserver. ([#&#8203;522](https://github.com/matrix-org/matrix-appservice-bridge/issues/522)) ([#&#8203;1092](https://github.com/matrix-org/matrix-hookshot/issues/1092))

##### Internal Changes

- Use emojis for all icons instead of dingbats, ensuring all clients render the icons in colour. ([#&#8203;1091](https://github.com/matrix-org/matrix-hookshot/issues/1091))

</details>

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### Configuration

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🔕 **Ignore**: Close this PR and you won't be reminded about this update again.

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---

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Reviewed-on: https://gitea.alexlebens.dev/alexlebens/infrastructure/pulls/1737
Co-authored-by: Renovate Bot <renovate-bot@alexlebens.net>
Co-committed-by: Renovate Bot <renovate-bot@alexlebens.net>

clusters/cl01tl/platform/matrix-synapse/values.yaml

@@ -130,7 +130,7 @@ matrix-hookshot:
         main:
           image:
             repository: halfshot/matrix-hookshot
-            tag: 7.1.0
+            tag: 7.2.0
             pullPolicy: IfNotPresent
           resources:
             requests: