Update changelogs and readme files for Jetpack 13.7. #74942

Job	Run time
Storybook tests	3m 26s
Static analysis	8m 38s
Determine tests matrix	8s
Check plugin monorepo dep versions	36s
PHP tests: PHP 7.2 WP latest	5m 54s
PHP tests: PHP 7.3 WP latest	5m 55s
PHP tests: PHP 7.4 WP latest	4m 51s
PHP tests: PHP 8.0 WP latest	4m 51s
PHP tests: PHP 8.1 WP latest	11m 42s
PHP tests: PHP 8.2 WP latest	6m 25s
PHP tests: PHP 8.3 WP latest	3m 51s
PHP tests: PHP 7.0 WP previous	4m 50s
PHP tests: PHP 8.2 WP previous	4m 7s
PHP tests: PHP 8.2 WP trunk	6m 5s
PHP tests: PHP 7.4 WP latest with WooCommerce	19m 20s
PHP tests: PHP 8.1 WP latest with wpcomsh	5m 22s
JS tests	2m 33s
	1h 38m 34s

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