fix(test): update read-dir CLI test to match current directory structure

The test was expecting only  in the examples directory, but
now there's both  and . Updated the test to expect
both files in the output.

Fixes the failing test in the test coverage workflow.

---
type: pre_commit_static_analysis_report
description: Results of running static analysis checks when committing changes.
report:
  - task: lint_filenames
    status: passed
  - task: lint_editorconfig
    status: passed
  - task: lint_markdown
    status: na
  - task: lint_package_json
    status: na
  - task: lint_repl_help
    status: na
  - task: lint_javascript_src
    status: na
  - task: lint_javascript_cli
    status: na
  - task: lint_javascript_examples
    status: na
  - task: lint_javascript_tests
    status: passed
  - task: lint_javascript_benchmarks
    status: na
  - task: lint_python
    status: na
  - task: lint_r
    status: na
  - task: lint_c_src
    status: na
  - task: lint_c_examples
    status: na
  - task: lint_c_benchmarks
    status: na
  - task: lint_c_tests_fixtures
    status: na
  - task: lint_shell
    status: na
  - task: lint_typescript_declarations
    status: na
  - task: lint_typescript_tests
    status: na
  - task: lint_license_headers
    status: passed
---

Author: Nishantsingh11

lib/node_modules/@stdlib/fs/read-dir/test/test.cli.js

@@ -156,7 +156,7 @@ tape( 'the command-line interface reads the entire contents of a directory', opt
 			t.fail( error.message );
 		} else {
 			str = stdout.toString();
-			t.strictEqual( str, 'index.js\n', 'prints directory contents to `stdout`' );
+			t.strictEqual( str, 'index.js\nindex.mjs\n', 'prints directory contents to `stdout`' );
 			t.strictEqual( stderr.toString(), '', 'does not print to `stderr`' );
 		}
 		t.end();