Update the MariaDB version strategy matrix #469

Job	Run time
Core running from build / Core running from build / Windows	3m 53s
Core running from src / Core running from src / Linux	2m 13s
Core running from build / Core running from build / Linux	2m 8s
Core running from src / Core running from src / Windows	3m 14s
Core running from build / Core running from build / MacOS	5m 35s
Gutenberg running from build / Gutenberg running from build / Linux	7m 23s
Core running from src / Core running from src / MacOS	5m 5s
Gutenberg running from src / Gutenberg running from src / Linux	7m 49s
Gutenberg running from build / Gutenberg running from build / Windows	12m 11s
Gutenberg running from src / Gutenberg running from src / Windows	11m 46s
Gutenberg running from build / Gutenberg running from build / MacOS	11m 12s
Gutenberg running from src / Gutenberg running from src / MacOS	18m 16s
Leave WordPress Playground details	7s
Slack Notifications	0s
Failed workflow tasks	0s
	1h 30m 52s

Provide feedback