Fix "lowest" resolution strategy with lower-bound only (#649)

- towards https://github.com/astral-sh/setup-uv/issues/648

Fix the bug described there, but this doesn't add the fast-path
optimisation suggested in that issue.

biome.json

@@ -1,5 +1,5 @@
 {
-  "$schema": "https://biomejs.dev/schemas/2.2.4/schema.json",
+  "$schema": "https://biomejs.dev/schemas/2.2.5/schema.json",
   "assist": {
     "actions": {
       "source": {