Do not parallelize selenium requests in order to avoid errors in CI #338

Job	Run time
check_code_format	1m 1s
check_licenses (net6.0, App)	34s
check_licenses_net472 (App)	2m 56s
check_version_command (net6.0)	32s
check_licenses (net6.0, Tests)	53s
check_licenses_net472 (Tests)	5m 47s
check_version_command (net7.0)	41s
check_version_command_net472	2m 59s
check_licenses (net6.0, ProjectWithReferenceContainingLicenseExpression)	47s
check_licenses_net472 (ProjectWithReferenceContainingLicenseExpression)	3m 27s
check_version_command (net8.0)	40s
check_licenses (net7.0, App)	37s
check_licenses (net7.0, Tests)	44s
test (ubuntu-latest, net6.0)	1m 54s
test_windows (net6.0)	3h 15m 8s
test (ubuntu-latest, net7.0)	1m 45s
test_windows (net7.0)	11m 47s
test (ubuntu-latest, net8.0)	1m 42s
check_licenses (net7.0, ProjectWithReferenceContainingLicenseExpression)	51s
test_windows (net8.0)	3h 15m 0s
test (macos-latest, net6.0)	6m 39s
check_licenses (net8.0, App)	47s
test_windows (net472)	13m 20s
test (macos-latest, net7.0)	1m 42s
check_licenses (net8.0, Tests)	33s
test (macos-latest, net8.0)	1m 41s
check_licenses (net8.0, ProjectWithReferenceContainingLicenseExpression)	28s
	7h 34m 55s

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