Merge tag 'v1.32.2'

Synapse 1.32.2 (2021-04-22)
===========================

This release includes a fix for a regression introduced in 1.32.0.

Bugfixes
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- Fix a regression in Synapse 1.32.0 and 1.32.1 which caused `LoggingContext` errors in plugins. ([\#9857](https://github.com/matrix-org/synapse/issues/9857))