use new implementation from toolkit

Signed-off-by: CrazyMax <crazy-max@users.noreply.github.com>

src/main.ts

@@ -33,7 +33,7 @@ actionsToolkit.run(
     });
 
     let toolPath;
-    if (Util.isValidUrl(inputs.version)) {
+    if (Util.isValidRef(inputs.version)) {
       if (standalone) {
         throw new Error(`Cannot build from source without the Docker CLI`);
       }