docs: fix typo in use-copilot-cli.md

changed 'versions' to 'version'

Author: onismosis

content/copilot/how-tos/copilot-cli/use-copilot-cli.md

@@ -178,7 +178,7 @@ For more information, see [AUTOTITLE](/copilot/how-tos/copilot-cli/add-custom-in
 
 ### Use {% data variables.copilot.custom_agents_short %}
 
-A {% data variables.copilot.copilot_custom_agent_short %} is a specialized versions of {% data variables.product.prodname_copilot_short %}. {% data variables.copilot.custom_agents_caps_short %} help {% data variables.product.prodname_copilot_short %} handle unique workflows, particular coding conventions, and specialist use cases.
+A {% data variables.copilot.copilot_custom_agent_short %} is a specialized version of {% data variables.product.prodname_copilot_short %}. {% data variables.copilot.custom_agents_caps_short %} help {% data variables.product.prodname_copilot_short %} handle unique workflows, particular coding conventions, and specialist use cases.
 
 {% data variables.copilot.copilot_cli_short %} includes a default group of {% data variables.copilot.custom_agents_short %} for common tasks: