fix(synkronus): return JSON content type for user list - #1028

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: amannn/action-semantic-pull-request@e32d7e603df1aa1ba07e981f2a23455dee596825. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

Unexpected input(s) 'allowMergeCommits', 'titleWording', 'titleWordingFail', valid inputs are ['types', 'scopes', 'requireScope', 'disallowScopes', 'subjectPattern', 'subjectPatternError', 'validateSingleCommit', 'validateSingleCommitMatchesPrTitle', 'githubBaseUrl', 'ignoreLabels', 'headerPattern', 'headerPatternCorrespondence', 'wip']