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Link the README Packagist badges #296

Job	Run time
PHPUnit: MW REL1_43, PHP 8.1 (TYPE normal)	25s
PHPUnit: MW master, PHP 8.5 (TYPE normal)	26s
PHPUnit: MW REL1_44, PHP 8.2 (TYPE normal)	22s
PHPUnit: MW REL1_46, PHP 8.4 (TYPE normal)	23s
PHPUnit: MW REL1_45, PHP 8.3 (TYPE normal)	17s
	1m 53s