docs: template announce

docs/abra/hack.md

@@ -370,6 +370,26 @@ For developers, while using this `-beta` format, the `y` part is the "major" ver
 - Wait until the build finishes on [build.coopcloud.tech](https://build.coopcloud.tech/toolshed/abra)
 - Deploy the new installer script (e.g. `cd ./scripts/installer && make`)
 - Check the release worked, (e.g. `abra upgrade; abra -v`)
+- Share the announcement:
+
+```
+📢📢📢 abra v0.XX  is finally here 📢📢📢
+
+TLDR; `abra upgrade` 👍
+
+Upgrade docs:
+https://docs.coopcloud.tech/abra/upgrade/
+
+Changelog:
+https://git.coopcloud.tech/toolshed/abra/releases/tag/0.XX.0-beta
+
+0.XX.x-beta 👉 0.XX.x-beta migration guide:
+https://docs.coopcloud.tech/abra/upgrade/#XXx-beta-0XXx-beta
+
+A huge thanks to everyone who helped get this release done ❤️‍🔥
+
+Happy Hacking 🫂
+```
 
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