Synapse 1.55.1 (2022-03-24)

This is a patch release that fixes an incompatibility with version 3.1.0 of the Jinja library, released on March 24th, 2022. Deployments of Synapse using the matrixdotorg/synapse Docker image or Debian packages from packages.matrix.org are not affected.

Internal Changes

• Remove uses of the long-deprecated jinja2.Markup which would prevent Synapse from starting with Jinja 3.1.0 or above installed. (#12289)