fix(biome): hold @biomejs/biome at 2.5.13, 2.5.15 breaks svelte attributes

README.md

@@ -30,6 +30,10 @@ merge it yourself when you want that code in production. The split is two
 `matchBaseBranches` rules, so the same update is never offered on both
 branches. A repo using this preset therefore needs a `dev` branch.
 
+`@biomejs/biome` is held at 2.5.13 for now: 2.5.15 rewrites the quotes inside
+Svelte attribute expressions and breaks the markup. Drop the rule once a fixed
+release is out.
+
 The repo has to carry the `renovate`, `wait-3d` and `deps-code` labels before
 the first run: Renovate fails on a label that does not exist. It also has to
 have a `dev` branch, otherwise Renovate skips that base branch and code