docs: Update systemjs import path

The import path in the system.md file was incorrect, pointing to a non-existent location. This commit updates the import path to correctly point to the location of the Test module within node_modules.

Author: jlongyam

docs/system.md

@@ -14,7 +14,7 @@ const basePath = url.pathToFileURL(process.cwd()).href;
 setBaseUrl(System, basePath);
 applyImportMap(System, {
   imports: {
-    "Test": "./dist/Test.js"
+    "Test": "./node_modules/@jlongyam/test/dist/Test.js"
   }
 });