develop
Correct attrs package name in requirements (#3492)
Adding a version picker for Synapse docs (#16533)
Add avatar and topic settings for server notice room (#16679)
Add config to change the delay before sending a notification email (#16696)
Expose OIDC discovery information under the CSAPI (#16726)
Clarify documentation for `only_for_reauth` (#16737)
Sentry Alert configuration based on production and development environment (#16738)
Write signing keys with file mode 0640 (#16740)