Merge branch 'master' into develop

docs/upgrade.md

@@ -90,9 +90,26 @@ process, for example:
 
 # Upgrading to v1.68.0
 
-As announced in the upgrade notes for v1.67.0, Synapse now requires a SQLite
+Two changes announced in the upgrade notes for v1.67.0 have now landed in v1.68.0.
-version of 3.27.0 or higher if SQLite is in use and source checkouts of Synapse
+
-now require a recent Rust compiler.
+## SQLite version requirement
+
+Synapse now requires a SQLite version of 3.27.0 or higher if SQLite is configured as
+Synapse's database.
+
+Installations using
+
+- Docker images [from `matrixdotorg`](https://hub.docker.com/r/matrixdotorg/synapse),
+- Debian packages [from Matrix.org](https://packages.matrix.org/), or
+- a PostgreSQL database
+
+are not affected.
+
+## Rust requirement when building from source.
+
+Building from a source checkout of Synapse now requires a recent Rust compiler
+(currently Rust 1.58.1, but see also the
+[Platform Dependency Policy](https://matrix-org.github.io/synapse/latest/deprecation_policy.html)).
 
 Installations using