Changelog (v6.1.5...v6.1.6)

• bug #47621 [Serializer] Allow getting discriminated type by class name (@TamasSzigeti)
• bug #47833 [TwigBridge] Remove empty spaces between choices when using checkbox-inline or checkbox-switch (@simondaigre)
• bug #47808 [HttpClient] Fix seeking in not-yet-initialized requests (@nicolas-grekas)
• bug #47798 [DoctrineBridge] Fix auto mapping for bundles that contain only embeddables (@jorissae)
• bug #47702 [Messenger] Fix default serializer not handling DateTime objects properly (@barton-webwings)
• bug #47764 [Serializer] fixed traceable decoration priorities (@mtarld)
• bug #47779 [Console] Fix Helper::removeDecoration hyperlink bug (@greew)
• bug #47753 [Mime] sync message serializer code for forward-compatibility (@xabbuh)
• bug #47763 [PropertyInfo] a readonly property must not be reported as being writable (@xabbuh)
• bug #47731 [WebProfiler] Fix overflow issue in Forms panel (@zolikonta)
• bug #46956 [FrameworkBundle] Allow to specify null for exception mapping configuration values (@andrew-demb)
• bug #47746 [HttpFoundation] Fix BinaryFileResponse content type detection logic (@X-Coder264)
• bug #47626 [Notifier] [Expo] Throw exception on error-response from expo api (@sdrewergutland)
• bug #47317 [Security] Fix login url matching when app is not run with url rewriting or from a sub folder (@sgehrig)

[PR] #47842