Update reverse proxy config for the new federated media worker endpoints

[vincejv]

See: element-hq/synapse#17421

New worker endpoints for authenticated client and federation media
Media repository workers handling Media APIs can now handle the following endpoint patterns:

^/_matrix/client/v1/media/.*$
^/_matrix/federation/v1/media/.*$

Please update your reverse proxy configuration.

[tcpipuk]

Thanks for raising that - I've added 4ba4ab9 to accommodate these endpoints! 👍