Fixes WordPress 6.7 warning about loading translations too early

[akirk]

Short introduction

• This fixes a WordPress 6.7 warning about loading translations too early.

Description of what the PR accomplishes

Admittedly, I cannot see a change in behavior, translations are loaded in the user language even without this PR. Still, I believe it is best practice to load the translations through the hook.

This error message is thrown before the PR:

#0 wp-includes/l10n.php(1386): _load_textdomain_just_in_time('health-check')
#1 wp-includes/l10n.php(194): get_translations_for_domain('health-check')
#2 wp-includes/l10n.php(306): translate('File integrity', 'health-check')
#3 wp-content/plugins/health-check/HealthCheck/Tools/class-health-check-files-integrity.php(20): __('File integrity', 'health-check')
#4 wp-content/plugins/health-check/HealthCheck/Tools/class-health-check-files-integrity.php(297): Health_Check_Files_Integrity->__construct()
#5 wp-content/plugins/health-check/health-check.php(72): require_once('wp-content/plugi...')
#6 wp-includes/class-wp-hook.php(324): HealthCheck\{closure}('')
#7 wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(NULL, Array)
#8 wp-includes/plugin.php(517): WP_Hook->do_action(Array)
#9 wp-settings.php(559): do_action('plugins_loaded')
#10 wp-config.php(232): require_once('wp-content/plugi...')
#11 wp-load.php(50): require_once('wp-content/plugi...')
#12 wp-blog-header.php(13): require_once('wp-content/plugi...')
#13 index.php(17): require('wp-content/plugi...')