Add 'Labspaces' to accepted vocabulary list (#24225)

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Co-authored-by: Craig Osterhout <craig.osterhout@docker.com>

Author: ajeetraina

_vale/config/vocabularies/Docker/accept.txt

@@ -311,3 +311,4 @@ Zsh
 [Tt]oolsets?
 [Rr]erank(ing|ed)?
 [Ee]vals?
+[Ll]abspaces?