v6.12.2

Public Changes:

• 🐛 ignore init() if Synthetics will inject its own instance of RUM (#3649) [RUM] [RUM-REACT] [RUM-SLIM]

Internal Changes:

• 👷 reduce playwright workers to improve reliability (#3650)
• 🔊 add cookie data in debug logs (#3647) [FLAGGING] [LOGS] [RUM] [RUM-REACT] [RUM-SLIM] [WORKER]