Update 0.6 release notes

docs/docs/the-marten-project/release-notes/0.6.md

@@ -38,3 +38,5 @@ _Under development._
 * A new `--log-level` command option was introduced to make it easier to configure the log level to use when running [management commands](../../development/management-commands.md) (see [Shared options](../../development/management-commands.md#shared-options) for more details).
 * The [`new`](../../development/reference/management-commands.md#new) management command now makes it possible to generate projects without configured databases when the `--database=none` option is used.
 * Projects generated with the [`new`](../../development/reference/management-commands.md#new) management command now include the [Referrer-Policy middleware](../../handlers-and-http/reference/middlewares.md#referrer-policy-middleware) by default.
+* The [`new`](../../development/reference/management-commands.md#new) management command now generates a `seed.cr` file when generating new project structures.
+* A new [`seed`](../../development/reference/management-commands.md#seed) management command was introduced to make it easy to execute seed files.