Support toml spec 1.0.0 (#245)

iarna/toml is unmaintained.
Replaced by smol-toml which is maintained and has the same api

Fixes: #242

src/utils/pyproject.ts

@@ -1,6 +1,6 @@
 import fs from "node:fs";
 import * as core from "@actions/core";
-import * as toml from "@iarna/toml";
+import * as toml from "smol-toml";
 
 export function getUvVersionFromConfigFile(
   filePath: string,