Table on filebeat decode_cef module is formatted incorrectly

From: @richiejarvis (https://github.com/elastic/website-www.elastic.co/issues/5070)

Provide the following information to help us identify and troubleshoot the issue.
- Page URL: https://www.elastic.co/guide/en/beats/filebeat/master/processor-decode-cef.html#processor-decode-cef
- Device type: PC
- Specifics (e.g., OS, Hardware, Browser, etc.):
Lenovo P71 - Windows 10 - Chrome and FF latest

List out steps on how to recreate the issue.
1. Visit https://www.elastic.co/guide/en/beats/filebeat/master/processor-decode-cef.html#processor-decode-cef and view the table
2. Note that the columns do not match - the options are written in the different font, and do not line up with the column headings.