bump(brighterscript): update to v0.68.4 #9864

Job	Run time
Registry lint	8s
Package tests / Identify packages to test	7s
Package tests / Test packages (darwin_arm64)	37s
Package tests / Test packages (darwin_x64)	59s
Package tests / Test packages (linux_arm)	25s
Package tests / Test packages (linux_arm64)	39s
Package tests / Test packages (linux_arm64_gnu)	24s
Package tests / Test packages (linux_arm_gnu)	27s
Package tests / Test packages (linux_x64)	44s
Package tests / Test packages (linux_x64_gnu)	56s
Package tests / Test packages (linux_x86)	32s
Package tests / Test packages (win_arm)	1m 43s
Package tests / Test packages (win_arm64)	1m 35s
Package tests / Test packages (win_x64)	3m 24s
Package tests / Test packages (win_x86)	2m 16s
Package tests / Status check	0s
	14m 56s

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