Bump build version to 1.5.3 [skip ci]

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| python | final | minor | `3.14.8-alpine` -> `3.15.1-alpine` |

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### Configuration

📅 **Schedule**: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 **Automerge**: Disabled by config. Please merge this manually once you are satisfied.

♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

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

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 - [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check this box

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This PR has been generated by [Renovate Bot](https://github.com/renovatebot/renovate).
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Reviewed-on: #19

Dockerfile

@@ -1,4 +1,4 @@
-FROM python:3.15.0-alpine AS base
+FROM python:3.15.1-alpine AS base
 
 ENV TZ=Europe/Paris
 

VERSION

@@ -1 +1 @@
-1.5.2
+1.5.3