Actually bump minimum Parse.ly version to 3.15 in parsely.yml workflow #8813

Job	Run time
WP 6.1.x, multisite: no, JP: yes, PHP: 8.1	2m 21s
WP 6.1.x, multisite: yes, JP: yes, PHP: 8.1	3m 16s
WP 6.2.x, multisite: no, JP: yes, PHP: 8.1	2m 8s
WP 6.2.x, multisite: yes, JP: yes, PHP: 8.1	2m 12s
WP 6.3.x, multisite: no, JP: yes, PHP: 8.1	2m 11s
WP 6.3.x, multisite: yes, JP: yes, PHP: 8.1	2m 15s
WP 6.4.x, multisite: no, JP: yes, PHP: 8.1	2m 11s
WP 6.4.x, multisite: yes, JP: yes, PHP: 8.1	2m 12s
WP 6.5.x, multisite: no, JP: yes, PHP: 8.1	2m 24s
WP 6.5.x, multisite: yes, JP: yes, PHP: 8.1	2m 31s
WP 6.6.x, multisite: no, JP: yes, PHP: 8.1	2m 10s
WP 6.6.x, multisite: yes, JP: yes, PHP: 8.1	3m 43s
WP latest, multisite: no, JP: yes, PHP: 8.1	2m 35s
WP latest, multisite: yes, JP: yes, PHP: 8.1	2m 25s
WP nightly, multisite: no, JP: yes, PHP: 8.1	2m 14s
WP nightly, multisite: yes, JP: yes, PHP: 8.1	2m 12s
WP latest, multisite: no, JP: no, PHP: 8.1	2m 8s
WP latest, multisite: yes, JP: no, PHP: 8.1	2m 24s
WP nightly, multisite: no, JP: yes, PHP: 8.2	2m 10s
WP nightly, multisite: yes, JP: yes, PHP: 8.2	2m 18s
WP nightly, multisite: no, JP: yes, PHP: 8.3	2m 10s
WP nightly, multisite: yes, JP: yes, PHP: 8.3	2m 15s
	52m 25s

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