fix: added danger admonition to emphasize the importance of never sending PKCS12 files via email

geant-tcs/docs/de/376ca61dd09cfc71579e9bf49725c60742dd51c04d00f32686f6a824d9ba4482.md

@@ -86,5 +86,8 @@ Laden Sie das Zertifikat als __PEM__ (_nicht_ __PEM bundle__) herunter.
 
 ![](img/tcs_harica_transition_process_download_certificate.webp){ width="560" }
 
+!!! danger "Nicht die falsche Datei verschicken"
+    Bitte __niemals__ die `.p12` verschicken, da diese ihren privaten Schlüssel enthält.
+
 Schicken Sie eine E-Mail an [ca@kit.edu](mailto:ca@kit.edu?subject=%5BHARICA%5D%20Please%20publish%20my%20new%20certificate%20to%20GAL)
 mit dem Subject `[HARICA] Please publish my new certificate to GAL`. Hängen Sie die eben heruntergeladene PEM-Datei an.  
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geant-tcs/docs/en/376ca61dd09cfc71579e9bf49725c60742dd51c04d00f32686f6a824d9ba4482.md

@@ -83,5 +83,8 @@ Download the certificate as __PEM__ (_not_ __PEM bundle__).
 
 ![](img/tcs_harica_transition_process_download_certificate.webp){ width="560" }
 
+!!! danger "Don't send the wrong file"
+    Make sure to __never__ send the `.p12` file which contains your private key. 
+
 Send an email to [ca@kit.edu](mailto:ca@kit.edu?subject=%5BHARICA%5D%20Please%20publish%20my%20new%20certificate%20to%20GAL)
 with the subject `[HARICA] Please publish my new certificate to GAL`. Attach the PEM file you just downloaded.
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