Update specification/keyvault/data-plane/Microsoft.KeyVault/stable/7.1/certificates.json

Co-authored-by: Heath Stewart <[email protected]>

Author: jlichwa

specification/keyvault/data-plane/Microsoft.KeyVault/stable/7.1/certificates.json

@@ -1842,7 +1842,7 @@
         "value": {
           "x-ms-client-name": "base64EncodedCertificate",
           "type": "string",
-          "description": "A PEM file or a Base64 encoded PFX file.  PEM files need to contain the private key."
+          "description": "A PEM file or a base64-encoded PFX file.  PEM files need to contain the private key."
         },
         "pwd": {
           "x-ms-client-name": "password",