docs: Update auto updater docs #2831

Job	Run time	Billable time
test-mac	5m 35s	0s
test-mac	5m 11s	0s
test-mac	5m 38s	0s
test-updater	1m 28s	0s
test-updater	1m 28s	0s
test-updater	1m 28s	0s
test-linux (ArtifactPublisherTest,BuildTest,ExtraBuildTest,RepoSlugTest,binDownloadTest,configura...	5m 32s	0s
test-linux (ArtifactPublisherTest,BuildTest,ExtraBuildTest,RepoSlugTest,binDownloadTest,configura...	5m 32s	0s
test-linux (ArtifactPublisherTest,BuildTest,ExtraBuildTest,RepoSlugTest,binDownloadTest,configura...	5m 32s	0s
test-windows (winCodeSignTest,differentialUpdateTest)	3m 44s	0s
test-windows (winCodeSignTest,differentialUpdateTest)	3m 44s	0s
test-windows (winCodeSignTest,differentialUpdateTest)	3m 44s	0s
test-linux (snapTest,debTest,fpmTest,protonTest)	6m 55s	0s
test-linux (snapTest,debTest,fpmTest,protonTest)	6m 55s	0s
test-linux (snapTest,debTest,fpmTest,protonTest)	6m 55s	0s
test-windows (installerTest,appxTest,msiTest,portableTest,assistedInstallerTest,protonTest)	6m 54s	0s
test-windows (installerTest,appxTest,msiTest,portableTest,assistedInstallerTest,protonTest)	6m 54s	0s
test-windows (installerTest,appxTest,msiTest,portableTest,assistedInstallerTest,protonTest)	6m 54s	0s
test-windows (BuildTest,oneClickInstallerTest,winPackagerTest,nsisUpdaterTest,webInstallerTest)	5m 13s	0s
test-windows (BuildTest,oneClickInstallerTest,winPackagerTest,nsisUpdaterTest,webInstallerTest)	5m 13s	0s
test-windows (BuildTest,oneClickInstallerTest,winPackagerTest,nsisUpdaterTest,webInstallerTest)	5m 13s	0s
	1h 45m 42s	0s

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