Update repo config to v0.13.0

[flora-hofmann-frequenz]

No description provided.

[Copilot]

Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.

Comments suppressed due to low confidence (2)

.github/workflows/ci.yaml:44

• Ensure that every matrix configuration which uses this expression defines 'arch'; otherwise, the conditional suffix may not resolve correctly at runtime.

runs-on: ${{ matrix.os }}${{ matrix.arch != 'amd64' && format('-{0}', matrix.arch) || '' }}

.github/dependabot.yml:37

• [nitpick] The exclusion of 'frequenz-repo-config*' in the 'minor' update group overlaps with the separate 'repo-config' group; consider consolidating these rules or clarifying the intent to avoid unintended grouping conflicts.

- "frequenz-repo-config*"