adding symfony8 to supported list (#1228) #2637

Job	Run time
Static analysis	33s
Coding Standard	40s
tests (8.2, 7.4.*, lowest, none)	36s
tests (8.3, 6.4.*, highest, none)	24s
tests (8.1, 6.4.*, lowest, none)	48s
tests (8.4, 5.4.*, lowest, none)	35s
tests (8.2, 5.4.*, highest, none)	35s
tests (8.3, 7.4.*, lowest, none)	27s
tests (8.1, 6.4.*, highest, none)	45s
tests (8.2, 7.4.*, highest, none)	31s
tests (8.2, 6.4.*, lowest, none)	32s
tests (8.4, 5.4.*, highest, none)	35s
tests (8.1, 5.4.*, lowest, none)	51s
tests (8.2, 6.4.*, highest, none)	37s
tests (8.1, 5.4.*, highest, none)	49s
tests (8.3, 5.4.*, lowest, none)	34s
tests (8.3, 5.4.*, highest, none)	35s
tests (8.3, 7.4.*, highest, none)	31s
tests (8.3, 6.4.*, lowest, none)	27s
tests (8.4, 7.4.*, lowest, none)	29s
tests (8.4, 6.4.*, highest, none)	34s
tests (8.4, 8.0.*, highest, pcov)	52s
tests (8.2, 5.4.*, lowest, none)	32s
tests (8.2, 5.4.*, lowest, --dev symfony/validator doctrine/orm doctrine/annotations)	55s
tests (8.4, 8.0.*, lowest)	52s
tests (8.4, 7.4.*, highest, none)	29s
tests (8.4, 6.4.*, lowest, none)	30s
tests (8.1, 5.4.*, lowest, pcov)	1m 5s
	17m 43s

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