i18n: add TRANSLATORS comment to Validate button in IdDocsValidation

Signed-off-by: Vitor Mattos <1079143+vitormattos@users.noreply.github.com>

Author: vitormattos

src/views/Documents/IdDocsValidation.vue

@@ -126,6 +126,7 @@
 									<template #icon>
 										<NcIconSvgWrapper :path="mdiEye" :size="20" />
 									</template>
+									<!-- TRANSLATORS: Button that triggers the cryptographic check of a signed document. "Validate" here is a technical process: the app checks the signature integrity, the certificate chain and revocation status. It does NOT mean approving or authorizing something. Choose a word in your language that conveys "to check" or "to verify", not "to approve" or "to authorize". -->
 									{{ t('libresign', 'Validate') }}
 								</NcActionButton>
 							</template>