Fix README following last major version #40

Job	Run time
Tests / Fetch supported versions	5s
Tests / Static analysis	23s
Tests / PHP 8.1 & Sf 6.4 - Bare minimum - Sf 6.4 case	24s
Tests / PHP 8.0 & Sf 5.4 - Bare minimum	17s
Tests / PHP 8.4 & Sf 5.4 - Late Symfony migration	2m 56s
Tests / PHP 8.2 & Sf 7.0 - Late PHP migration	20s
Tests / PHP 8.4 & Sf 6.4 - Up to date versions - Sf 6.4 case	3m 30s
Tests / PHP 8.4 & Sf 7.0 - Up to date versions	3m 39s
Tests / Nightly - PHP 8.5 & Sf 7.0 - PHP with highest supported Symfony versions	16s
Tests / Nightly - PHP 8.2 & Sf 7.1 - Symfony with lowest supported PHP version	16s
Tests / Nightly - PHP 8.4 & Sf 7.1 - Symfony with highest supported PHP version	16s
Tests / Nightly - PHP 8.5 & Sf 5.4 - PHP with lowest supported Symfony versions	23s
	12m 45s

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