[ci skip] Upgrade po4a (1e6c31274c4c49a6dbefa33293de692b67970d68)
[ci skip] Upgrade po4a (1e6c31274c4c49a6dbefa33293de692b67970d68)

Switching to latest po4a to resolve some issues.

openstandia/keycloak-documentation-i18n,openstandia/keycloak-documentation-i18n,openstandia/keycloak-documentation-i18n