Update e.signature terminology to FIEL

Author: edgtz

website/i18n/en/docusaurus-plugin-content-docs-stripe-docs/current/04-organizacion-emisora/carta-manifiesto

@@ -5,7 +5,7 @@ sidebar_position: 999
 
 Under `Settings > Sign Carta Manifiesto`, [sign the letter](https://dashboard.facturapi.io/settings/manifiesto) to comply with the current RMF regulations.
 
-In this step, the issuing RFC's e.signature (e.firma) is used to sign the manifest letter. To complete the signature process, the following is required:
+In this step, the issuing RFC's e.firma (FIEL) is used to sign the manifest letter. To complete the signature process, the following is required:
 
 - `.cer` e.signature file