pull_request_template.md: Set path to CONTRIBUTING.md #711

Job	Run time
PHPUnit Composer v2 (PHP 7.4)	2m 42s
PHPUnit coverage (PHP 7.4)	46s
PHPUnit (PHP 7.1)	2m 48s
Tests alternative autoloader (PHP 7.1)	15s
PHPUnit lowest deps (PHP 7.3)	3m 8s
Tests alternative autoloader (PHP 7.2)	11s
PHPUnit (PHP 7.2)	3m 4s
Tests alternative autoloader (PHP 7.3)	14s
PHPUnit (PHP 7.3)	2m 41s
Tests alternative autoloader (PHP 7.4)	11s
PHPUnit (PHP 7.4)	31s
Windows-Tests with PHP 7.1	1m 12s
Tests alternative autoloader (PHP 8.0)	7s
PHPUnit (PHP 8.0)	2m 49s
Windows-Tests with PHP 7.2	58s
Tests alternative autoloader (PHP 8.1)	8s
PHPUnit (PHP 8.1)	2m 41s
Windows-Tests with PHP 7.3	1m 1s
Tests alternative autoloader (PHP 8.2)	6s
PHPUnit (PHP 8.2)	2m 48s
Windows-Tests with PHP 7.4	1m 4s
Tests alternative autoloader (PHP 8.3)	12s
PHPUnit (PHP 8.3)	2m 51s
Windows-Tests with PHP 8.0	59s
Tests alternative autoloader (PHP 8.4)	10s
PHPUnit (PHP 8.4)	2m 49s
Windows-Tests with PHP 8.1	1m 1s
Windows-Tests with PHP 8.2	54s
Windows-Tests with PHP 8.3	58s
Windows-Tests with PHP 8.4	58s
	40m 17s

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