Eug and IG markup fixes

[MichalMaler]

Signed-off-by: Michal Maléř mmaler@redhat.com

Read our Contribution guide before submitting a PR.

What does this PR do?

What issues does this PR fix or reference?

Specify the version of the product this PR applies to.

PR Checklist

As the author of this Pull Request, I made sure that:

• vale has been run successfully against the PR branch
• Link checker has been run successfully against the PR branch
• Documentation describes a scenario that is already covered by QE tests, otherwise, an issue has been created and acknowledged by Che QE team
• Changed article references are updated where they are used (or a redirect has been set up on the docs side):
  • Dashboard branding.json
  • Chectl constants.ts

Proper markup for __XXXX__ terms