Website: Change APNS CSR email attachment filename (#10682)

Closes: #10417

Changes:
- Changed the filename of the APNS CSR attachment:
`apple-apns-request.txt` » `apple-apns-csr.txt`

.

Co-authored-by: Mike McNeil <mikermcneil@users.noreply.github.com>

website/api/controllers/deliver-apple-csr.js

@@ -144,7 +144,7 @@ module.exports = {
         // base64 format, we doubly encode the contents before sending the
         // email.
         contentBytes: Buffer.from(generateCertificateResult.request).toString('base64'),
-        name: 'apple-apns-request.txt',
+        name: 'apple-apns-csr.txt',
         type: 'text/plain',
       }],
     }).intercept((err)=>{