test(packaging): align readme install assertion

test/packaging.test.ts

@@ -47,6 +47,6 @@ test("includes a publishable readme that documents the Bun runtime", () => {
   const readme = readFileSync(readmePath, "utf8");
   expect(readme).toContain("Skills Vault");
   expect(readme).toContain("Bun-only runtime");
-  expect(readme).toContain("npm install -g @xixu-me/skills-vault");
+  expect(readme).toContain("bun add -g @xixu-me/skills-vault@latest");
   expect(readme).toContain("npm publish --access public");
 });