[8.13] [DOCS] Add block kit messages in Slack connector (#177677)#178269

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kibanamachine merged 1 commit intoelastic:8.13from kibanamachine:backport/8.13/pr-177677

Mar 8, 2024

+17-8

Commits on Mar 8, 2024

[DOCS] Add block kit messages in Slack connector (elastic#177677 )
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