chore: Update actions sample in appstarter

[totoprayogo1916]

Description
Update actions to latest version in appstarter
ref:

• https://github.com/actions/checkout
• https://github.com/actions/cache
• https://github.blog/changelog/2021-02-08-github-actions-skip-pull-request-and-push-workflows-with-skip-ci/
• https://github.blog/changelog/2022-10-11-github-actions-deprecating-save-state-and-set-output-commands/

Checklist:

• Securely signed commits
• Component(s) with PHPDoc blocks, only if necessary or adds value
• Unit testing, with >80% coverage
• User guide updated
• Conforms to style guide

[kenjis]

Thank you, but please remove this sample file.
Because it is no longer used.

$ composer create-project codeigniter4/appstarter ci4app
$ cd ci4app/
$ ls -la
total 240
drwxr-xr-x  17 kenji  staff    544  9 28 09:32 .
drwxr-xr-x  36 kenji  staff   1152  9 28 09:32 ..
-rw-r--r--   1 kenji  staff   1860  9  5 09:46 .gitignore
-rw-r--r--   1 kenji  staff   1159  9  5 09:46 LICENSE
-rw-r--r--   1 kenji  staff   2713  9  5 09:46 README.md
drwxr-xr-x  15 kenji  staff    480  9  5 09:46 app
-rwxr-xr-x   1 kenji  staff   3873  9  5 09:46 builds
-rw-r--r--   1 kenji  staff    995  9  5 09:46 composer.json
-rw-r--r--   1 kenji  staff  79440  9 28 09:32 composer.lock
-rw-r--r--   1 kenji  staff   4938  9  5 09:46 env
-rw-r--r--   1 kenji  staff   2415  9  5 09:46 phpunit.xml.dist
-rw-r--r--   1 kenji  staff   3190  9  5 09:46 preload.php
drwxr-xr-x   6 kenji  staff    192  9  5 09:46 public
-rwxr-xr-x   1 kenji  staff   3250  9  5 09:46 spark
drwxr-xr-x   7 kenji  staff    224  9  5 09:46 tests
drwxr-xr-x  18 kenji  staff    576  9 28 09:32 vendor
drwxr-xr-x   8 kenji  staff    256  9  5 09:46 writable

[kenjis]

If a sample workflow for GitHub Actions is needed, see devkit.