Bump version of framework to 6.4.6 #1558

Job	Run time
python 3.6 macos-11	4m 27s
python 3.11 macos-11	6m 59s
java 8 macos-11	4m 4s
python 3.6 windows-2019	5m 21s
python 3.11 windows-2019	3m 56s
java 8 windows-2019	3m 48s
python 3.6 ubuntu-20.04	1m 38s
python 3.11 ubuntu-20.04	1m 37s
java 8 ubuntu-20.04	1m 29s
windows_meterpreter windows-2019	4m 11s
windows_meterpreter windows-2022	6m 36s
mettle macos-11	3m 37s
mettle ubuntu-20.04	1m 54s
Generate report	31s
	50m 8s

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