docs: initrd support is not released yet
When PR was merged, the changelog entry was
added under 0.19.0. This seems like a mistake as 0.19.0
was already released.
## [Unreleased]
+### Added
+
+- Support for booting with an initial RAM disk image. This image can be
+ specified through the new `initrd_path` field of the `/boot-source` API
+ request.
+
### Fixed
- Fixed #1469 - Broken GitHub location for Firecracker release binary.
all parameters specified after `--` are forwarded verbatim to Firecracker.
- Added `KVM_PTP` support to the recommended guest kernel config.
- Added entry in FAQ.md for Firecracker Guest timekeeping.
-- Support for booting with an initial RAM disk image. This image can be
- specified through the new `initrd_path` field of the `/boot-source` API
- request.
### Changed
