Increment version to 5.4.6.2 for development #3052

Job	Run time
Lint	50s
macOS 12 native [GOAL install] [GUI] [no depends]	26m 15s
ARM [GOAL install] [buster]	12m 9s
Win32	8m 8s
Win64	11m 49s
i386 Linux [GOAL install] [focal]	12m 42s
x86_64 Linux [GOAL install] [GUI] [focal] [no depends]	15m 43s
x86_64 Linux [GOAL install] [GUI] [bionic] [no depends]	14m 43s
macOS 10.14 [GOAL deploy] [GUI] [no tests] [focal]	9m 30s
	1h 51m 49s

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