Ensure documents language is accessible and inclusive

[scottrigby]

Tasks need to be further detailed out:

• Best effort internal review using readily available accessible language guides #29
• Request technical doc review by CNCF/LF
  • Add support ticket https://cncfservicedesk.atlassian.net/servicedesk/customer/portal/1/CNCFSD-954?created=true
  • Added to CNCF techdocs queue (to be addressed after kubecon) https://github.com/cncf/techdocs/projects/3
  • Actual review

[scottrigby]

See @lloydchang suggestion in #29 (comment)