Text cleanup pass for old names

[JustSlone]

(from @ecraig12345)

After packages are renamed (#14688 and #13384), we need to remove references to Fabric, office-ui-fabric-react, oufr, OUFR, OUIFR, @uifabric, etc from text in various places:

• Files in the repo
  • oufrVersion/oufr-version references in the release pipeline should probably stay since they'll cause a cascading effect with other pipelines
  • Similar if we rename fabric-website or fabric-website-resources
• Wiki (some may have to wait until after release)
• aka.ms/fabricdemo
• Other?

[layershifter]

@JustSlone @ecraig12345 is it still a thing? ⌚ (this issue is opened more than 1 year)

[JustSlone]

Closing out, this isn't important to tackle at this time. If this becomes important, feel free to reopen or file a new issue. I did a quick scan of our wiki it looks like the references to OUFR, etc are correct.