chore: upgrade argilla-server Docker image trying to fix some vulnerabilities

[jfcalvo]

Description

This PR includes some changes to our Dockerfile at argilla-server:

• Increase Python Docker image from python:3.10.12-slim to python:3.10.15-slim.
• Add calls to apt-get upgrade so we have the latest version of the dependencies.

Type of change

• Improvement (change adding some improvement to an existing functionality)

How Has This Been Tested

• Manually check that the generated Docker image does not have vulnerabilities or at least some of them disappear.
• Manually test that HF Spaces correctly support these changes.

Checklist

• I added relevant documentation
• I followed the style guidelines of this project
• I did a self-review of my code
• I made corresponding changes to the documentation
• I confirm My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• I have added relevant notes to the CHANGELOG.md file (See https://keepachangelog.com/)

[jfcalvo]

I will not merge this PR until I have confirmation that the security vulnerabilities are fixed.