Update website/content/api-docs/auth/cert.mdx

Co-authored-by: tjperry07 <tjperry07@users.noreply.github.com>

website/content/api-docs/auth/cert.mdx

@@ -61,7 +61,7 @@ Sets a CA cert and associated parameters in a role name.
   string or array of `oid:value`. Expects the extension value to be some type
   of ASN1 encoded string. All conditions _must_ be met. Supports globbing on
   `value`.
-- `allowed_metadata_extensions` `(array:[])` - A comma-separated string or
+- `allowed_metadata_extensions` `(array:[])` - A comma separated string or
   array of oid extensions. Upon successful authentication, these extensions
   will be added as metadata if they are present in the certificate. The
   metadata key will be the string consisting of the oid numbers separated