release(v1.9.0-alpha.0): prepare release

This is the official v1.9.0-alpha.0 release.

Signed-off-by: Andrey Smirnov <[email protected]>

CHANGELOG.md

@@ -1,3 +1,29 @@
+## [overlays 1.9.0-alpha.0](https://github.com/siderolabs/overlays/releases/tag/v1.9.0-alpha.0) (2024-10-18)
+
+Welcome to the v1.9.0-alpha.0 release of overlays!  
+*This is a pre-release of overlays*
+
+
+
+Please try out the release binaries and report any issues at
+https://github.com/siderolabs/overlays/issues.
+
+### Contributors
+
+
+### Changes
+<details><summary>0 commit</summary>
+<p>
+
+</p>
+</details>
+
+### Dependency Changes
+
+This release has no dependency changes
+
+Previous release can be found at [v1.8.0](https://github.com/siderolabs/overlays/releases/tag/v1.8.0)
+
 ## [overlays 1.8.0-alpha.2](https://github.com/siderolabs/overlays/releases/tag/v1.8.0-alpha.2) (2024-08-30)
 
 Welcome to the v1.8.0-alpha.2 release of overlays!  

hack/release.toml

@@ -5,15 +5,7 @@ project_name = "overlays"
 github_repo = "siderolabs/overlays"
 match_deps = "^github.com/(siderolabs/[a-zA-Z0-9-]+)$"
 
-previous = "v1.7.0"
+previous = "v1.8.0"
 pre_release = true
 
 [notes]
-  [notes.sbc]
-    title = "SBC support"
-    description = """\
-Updates for the following overlays:
-
-* [Raspberry Pi](https://github.com/siderolabs/sbc-raspberrypi/)
-* [RockChip](https://github.com/siderolabs/sbc-rockchip/)
-"""