CI: Fix biome.json root setting for standalone execution

Author: ndbroadbent

.github/workflows/ci.yml

@@ -33,6 +33,11 @@ jobs:
       - name: TypeScript type checking
         run: bun run typecheck
 
+      # biome.json has "root": false to inherit from parent in worktree
+      # In CI there's no parent, so we set it to true
+      - name: Fix biome.json for standalone CI
+        run: sed -i 's/"root": false/"root": true/' biome.json
+
       - name: Lint (Biome)
         run: bun run lint