Fix the outdated version number in the template

[llucax]

No description provided.

[Copilot]

Pull Request Overview

This PR fixes the outdated dependency version for "frequenz-repo-config" by updating all references from 0.12.3 to 0.13.1 across various project files. It also updates the cookiecutter template and the release notes to reflect this change.

• Updated dependency versions in pyproject.toml files for model, lib, app, api, and actor projects.
• Modified the cookiecutter template to use the new version.
• Adjusted the release notes to document the version number fix.

Reviewed Changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
tests_golden/integration/test_cookiecutter_generation/model/frequenz-model-test/pyproject.toml	Updated model dependency version from 0.12.3 to 0.13.1.
tests_golden/integration/test_cookiecutter_generation/lib/frequenz-test-python/pyproject.toml	Updated lib dependency version from 0.12.3 to 0.13.1.
tests_golden/integration/test_cookiecutter_generation/app/frequenz-app-test/pyproject.toml	Updated app dependency version from 0.12.3 to 0.13.1.
tests_golden/integration/test_cookiecutter_generation/api/frequenz-api-test/pyproject.toml	Updated api dependency version from 0.12.3 to 0.13.1.
tests_golden/integration/test_cookiecutter_generation/actor/frequenz-actor-test/pyproject.toml	Updated actor dependency version from 0.12.3 to 0.13.1.
cookiecutter/{{cookiecutter.github_repo_name}}/pyproject.toml	Updated template dependency version from 0.12.3 to 0.13.1.
RELEASE_NOTES.md	Adjusted release notes to note the version fix.

[llucax]

Minor, so I will force-merge and release.