Update Agents plugin to v1.4.0 (#34129) (#34452)

Automatic Merge

server/Makefile

@@ -151,7 +151,7 @@ PLUGIN_PACKAGES += mattermost-plugin-playbooks-v1.41.1
 PLUGIN_PACKAGES += mattermost-plugin-playbooks-v2.3.0
 PLUGIN_PACKAGES += mattermost-plugin-servicenow-v2.3.4
 PLUGIN_PACKAGES += mattermost-plugin-zoom-v1.8.0
-PLUGIN_PACKAGES += mattermost-plugin-agents-v1.2.4
+PLUGIN_PACKAGES += mattermost-plugin-agents-v1.4.0
 PLUGIN_PACKAGES += mattermost-plugin-boards-v9.1.7
 PLUGIN_PACKAGES += mattermost-plugin-msteams-v2.2.2
 PLUGIN_PACKAGES += mattermost-plugin-user-survey-v1.1.1