Bump moodlehq/moodle-cs from 3.3.14 to 3.3.15 #325

Job	Run time
test (8.2, main, pgsql)	4m 1s
test (8.2, main, mariadb)	3m 54s
test (8.2, MOODLE_403_STABLE, pgsql)	4m 5s
test (8.2, MOODLE_402_STABLE, pgsql)	4m 1s
test (8.1, MOODLE_401_STABLE, pgsql)	4m 28s
test (8, MOODLE_400_STABLE, pgsql, xmlrpc-beta)	4m 36s
test (8, MOODLE_311_STABLE, pgsql, xmlrpc-beta)	4m 12s
test (7.4, MOODLE_310_STABLE, pgsql)	4m 0s
test (7.4, MOODLE_39_STABLE, pgsql)	4m 1s
test (7.4, MOODLE_38_STABLE, pgsql)	3m 58s
test (8.1, main, pgsql)	4m 11s
test (8.1, main, mariadb)	4m 2s
test (8, MOODLE_403_STABLE, pgsql)	4m 28s
test (8, MOODLE_402_STABLE, pgsql)	4m 9s
test (7.4, MOODLE_401_STABLE, pgsql)	4m 25s
	1h 2m 31s

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