exclude copyright year from license validation #560

Job	Run time
check_code_format	1m 28s
check_licenses_net472 (App)	3m 15s
check_version_command (net6.0)	35s
check_licenses_net472 (Tests)	3m 21s
check_version_command (net8.0)	17s
check_licenses (net6.0, App)	31s
check_licenses_net472 (ProjectWithReferenceContainingLicenseExpression)	1m 24s
check_version_command (net9.0)	26s
check_licenses (net6.0, Tests)	46s
check_version_command_net472	2m 39s
check_licenses (net6.0, ProjectWithReferenceContainingLicenseExpression)	41s
check_licenses (net8.0, App)	20s
test_windows (net6.0)	6m 12s
test (ubuntu-latest, net6.0)	1m 33s
check_licenses (net8.0, Tests)	40s
test_windows (net8.0)	4m 44s
test (ubuntu-latest, net8.0)	1m 17s
check_licenses (net8.0, ProjectWithReferenceContainingLicenseExpression)	19s
test_windows (net472)	4m 54s
test (ubuntu-latest, net9.0)	1m 24s
check_licenses (net9.0, App)	25s
test_windows (net9.0)	5m 45s
test (macos-latest, net6.0)	1m 35s
check_licenses (net9.0, Tests)	33s
test (macos-latest, net8.0)	1m 32s
check_licenses (net9.0, ProjectWithReferenceContainingLicenseExpression)	27s
test (macos-latest, net9.0)	1m 33s
	48m 36s

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