slack-desktop: update to 2.8.1
slack-desktop: update to 2.8.1

Closes: #8163 [via git-merge-pr]

necrophcodr/void-packages,kulinacs/void-packages,opsaaspo/void-packages,coredumb/void-packages,EaterOfCode/void-packages,kulinacs/void-packages,opsaaspo/void-packages,opsaaspo/void-packages,floGik/void-packages,EaterOfCode/void-packages,EaterOfCode/void-packages,opsaaspo/void-packages,liwakura/void-packages,coredumb/void-packages,floGik/void-packages,EaterOfCode/void-packages,NeoChontrix/void-packages,kulinacs/void-packages,kulinacs/void-packages,coredumb/void-packages,floGik/void-packages,liwakura/void-packages,juliendehos/void-packages,coredumb/void-packages,NeoChontrix/void-packages,floGik/void-packages,opsaaspo/void-packages,necrophcodr/void-packages,floGik/void-packages,kulinacs/void-packages,kulinacs/void-packages,necrophcodr/void-packages,juliendehos/void-packages,NeoChontrix/void-packages,juliendehos/void-packages,coredumb/void-packages,necrophcodr/void-packages,liwakura/void-packages,EaterOfCode/void-packages,liwakura/void-packages,NeoChontrix/void-packages,liwakura/void-packages,floGik/void-packages,necrophcodr/void-packages,juliendehos/void-packages,opsaaspo/void-packages,NeoChontrix/void-packages,NeoChontrix/void-packages,coredumb/void-packages,liwakura/void-packages,juliendehos/void-packages,juliendehos/void-packages