Update simplesamlphp/simplesamlphp-test-framework requirement #1291

Job	Run time
Linter	1m 27s
Security checks	14s
Quality control	27s
Code coverage	0s
Cleanup artifacts	0s
format('Unit tests, PHP {0}, {1}', matrix.php-versions, matrix.operating-system)	0s
format('Unit tests, PHP {0}, {1}', matrix.php-versions, matrix.operating-system)	0s
	2m 8s

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