fix frontmatter keywords value type (string, instead of []string) in /docs/reference

Signed-off-by: Gaetan de Villele <gdevillele@gmail.com>
Upstream-commit: 572c6bb89a
Component: cli

components/cli/docs/reference/commandline/stack_deploy.md

@@ -1,7 +1,7 @@
 ---
 title: "stack deploy"
 description: "The stack deploy command description and usage"
-keywords: ["stack, deploy, up"]
+keywords: "stack, deploy, up"
 advisory: "experimental"
 ---