Add info for `--filter` in CLI docs #890

Job	Run time
test	0s
pack (DiscordChatExporter.Cli, win-arm64)	1m 45s
pack (DiscordChatExporter.Cli, win-x86)	1m 16s
format	28s
pack (DiscordChatExporter.Cli, win-x64)	1m 18s
pack (DiscordChatExporter.Cli, linux-arm)	41s
pack (DiscordChatExporter.Cli, linux-arm64)	27s
pack (DiscordChatExporter.Cli, linux-musl-x64)	38s
pack (DiscordChatExporter.Cli, linux-x64)	29s
pack (DiscordChatExporter.Cli, osx-arm64)	28s
pack (DiscordChatExporter.Cli, osx-x64)	37s
pack (DiscordChatExporter.Gui, win-arm64)	2m 8s
pack (DiscordChatExporter.Gui, win-x86)	2m 0s
pack (DiscordChatExporter.Gui, win-x64)	1m 18s
pack (DiscordChatExporter.Gui, linux-arm)	37s
pack (DiscordChatExporter.Gui, linux-arm64)	34s
pack (DiscordChatExporter.Gui, linux-musl-x64)	38s
pack (DiscordChatExporter.Gui, linux-x64)	31s
pack (DiscordChatExporter.Gui, osx-arm64)	39s
pack (DiscordChatExporter.Gui, osx-x64)	55s
release	0s
deploy	0s
notify	0s
	17m 27s

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