Bump actions/upload-artifact from 5 to 6 in the actions group #103

Job	Run time
WP VIP CS (PHP 8.3)	23s
Security Scan (PHP 8.3)	20s
PHPStan for WP (PHP 8.3)	27s
PHPCS (PHP 8.3)	18s
Psalm Static Analysis (PHP 8.3)	26s
WP Plugin Check (PHP 8.3)	1m 38s
PHPMD (PHP 8.3)	16s
Test WordPress nightly with PHP 8.3	1m 17s
Test WordPress 6.5 with PHP 8.3	1m 3s
Test WordPress 6.5 with PHP 8.0	1m 6s
Test WordPress latest with PHP 8.4	1m 9s
Test WordPress 6.5 with PHP 7.4	1m 6s
Test WordPress 6.5 with PHP 8.4	58s
Test WordPress latest with PHP 7.4	1m 1s
Test WordPress latest with PHP 8.0	1m 1s
Test WordPress nightly with PHP 7.4	1m 1s
Test WordPress nightly with PHP 8.0	1m 10s
Test WordPress latest with PHP 8.3	1m 12s
Test WordPress nightly with PHP 8.4	1m 15s
	17m 7s

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