5.2.0

What's Changed

• Actions upgrade. by @svogt0511 in #879
• Actions Upgrade - convert ::set-output by @svogt0511 in #880
• Actions Upgrade - convert ::set-output - syntax by @svogt0511 in #881
• Actions Upgrade - convert ::set-output syntax by @svogt0511 in #882
• Update actions to remove additional deprecation messages (set-output, etc) by @svogt0511 in #884
• Adds title sort by first title functionality to the /dois endpoint by @codycooperross in #887
• Makes /dois endpoint title sort case insensitive by @codycooperross in #891
• Update dependencies by @jrhoads in #892
• Reduce repeated code and re-use existing concerns by @kjgarza in #883
• Fix 2022->2023 errors by @digitaldogsbody in #895
• Add relatedItems to the openapi file for the docs by @digitaldogsbody in #894
• Doi enrichment - Add subjects to repositories/clients by @jrhoads in #877
• Adjusts validation of Doi language attribute to allow non-ISO 639-1 values by @codycooperross in #893
• Create CITATION.cff by @mfenner in #767
• Fix ES index definition to match the JSON data structure by @digitaldogsbody in #909
• Add missing method for subject assignment used by the RepositoriesController by @jrhoads in #899

Full Changelog: 5.1.1...5.2.0