Added Portugal Tax docs (#12033)

* added 2 new tax docs

* update name

* update doc

Author: lizokm

docs/security-legal-pii/security/tax-documents.mdx

@@ -17,3 +17,5 @@ Below you'll find Sentry's 2023 tax documents, including the tax residency certi
 - [Indonesia: Form DGT-1 CY 2023](/pdfs/Form-DGT-New_Indonesia_FY23.pdf)
 - [Indonesia: Form DGT-1 CY 2024](/pdfs/Form-DGT-New_Indonesia_FY24_signed.pdf)
 - [Portugal: RFI_21_CY 2024](/pdfs/RFI_21_Portgual_Sentry_signed-FY2024-external.pdf)
+- [Portugal: RFI_21_CY 2023](/pdfs/RFI_21_Portgual_Sentry_signed-FY2023-external.pdf)
+- [Portugal: RFI_21_CY 2022](/pdfs/RFI_21_Portgual_Sentry_signed-FY20222-external.pdf)