chore: retire Renovate — this repository's dependency bot is buddy

Review threads live on the whole diff, not on one commit, so none are shown here - a thread's line means something in the branch's final form, and painting it into an intermediate step would put it on code it is not about.

.github/renovate.jsonmodified+3-3

Changes to .github/renovate.json

		@@ -1,5 +1,5 @@
1	1	{
2		- "extends": [
3		- "github>ow3org/renovate-config"
4		- ]
	2	+ "$schema": "https://docs.renovatebot.com/renovate-schema.json",
	3	+ "enabled": false,
	4	+ "description": "Renovate is retired here: buddy dogfoods itself on this repository (see .github/workflows/buddy.yml). Disabled via config rather than deleted so the Renovate app neither runs nor reopens an onboarding PR."
5	5	}