Maintenance and security release of the Drupal 9 series.
This release fixes a security vulnerability. Sites are urged to upgrade immediately after reading the notes below and the security announcement:
No other fixes are included.
Resolves SA-CONTRIB-2021-009.
No other changes since 8.x-3.5.
Resolves SA-CONTRIB-2021-007.
Changes from 8.x-2.0-beta2:
Resolves SA-CONTRIB-2021-008.