chore(project): update release proced. acc. to recent process updates

[MaxTru]

Which issue does this PR address?

addresses https://github.com/bpmn-io/internal-docs/issues/152

Acceptance Criteria

• [ ] Corresponds to the concept https://github.com/bpmn-io/internal-docs/issues/152
• [ ] Corresponds to the design follows existing structure

Definition of Done

• [ ] corresponds to the design principles
• [ ] corresponds to the code standards
• [ ] passes Continuous Integration checks
• [ ] available as feature branch on GitHub
  • [ ] contains the cleaned up commit history
  • [ ] commit messages satisfy our commit message guidelines
  • [ ] a single commit closes the issue via Closes #issuenr