Fix: PHP 8.5: Incorrect array access in `wp_get_attachment_image_src` #34127

Job	Run time
Determine Matrix	4s
Single Site Default / Test current	13m 54s
Multisite Default / Test current	14m 10s
Multisite Default / Test before	13m 53s
Multisite Memcached / Test before	14m 25s
Single Site Default / Test before	14m 28s
Multisite Memcached / Test current	13m 56s
Single Site Memcached / Test before	14m 17s
Single Site Memcached / Test current	13m 8s
Compare / Single Site Default	15s
Compare / Multisite Default	10s
Compare / Multisite Memcached	11s
Compare / Single Site Memcached	10s
Slack Notifications	0s
Failed workflow tasks	-1s
	1h 53m 0s

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