As of https://github.com/rclone/rclone/commit/4280ec75ccfd27fbc4f646d5323b8ed060062be5 the lib/transform docs are generated with //go:generate and embedded with //go:embed. Before this change, however, they were not getting automatically updated with subsequent changes (like https://github.com/rclone/rclone/commit/fe62a2bb4ea8f62a1567c7883c0bba81827656eb) because `go generate ./lib/transform` was not being run as part of the release making process. This change fixes that by running it in `make commanddocs`.