ci(mergify): upgrade configuration to current format

[mergify]

No more deprecated fields are being used in your Mergify configuration, this pull request will be closed.

[mergify]

Merge Protections

Your pull request matches the following merge protections and will not be merged until they are valid.

🟢 Changelog requirements

Wonderful, this rule succeeded.

• any of:
  • -title ~= ^feat
  • label = need changelog
  • label = skip changelog

🟢 Enforce conventional commit

Wonderful, this rule succeeded.

Make sure that we follow https://www.conventionalcommits.org/en/v1.0.0/

• title ~= ^(fix|feat|docs|style|refactor|perf|test|build|ci|chore|revert)(?:\(.+\))?:

🟢 🔎 Reviews

Wonderful, this rule succeeded.

• #changes-requested-reviews-by = 0
• #review-requested = 0
• #review-threads-unresolved = 0