[YUNIKORN-2418] Improve clarity in Features docs

[alex-stiff]

What is this PR for?

This PR updates some wording in the features documentation to improve clarity and understanding.

What type of PR is it?

• - Bug Fix
• - Improvement
• - Feature
• - Documentation
• - Hot Fix
• - Refactoring

Todos

• - Add JIRA issue once ASF self service has created me an account

What is the Jira issue?

• Open an issue on Jira https://issues.apache.org/jira/browse/YUNIKORN/
• Put link here, and add [YUNIKORN-Jira number] in PR title, eg. [YUNIKORN-2] Gang scheduling interface parameters

How should this be tested?

n/a

Screenshots (if appropriate)

n/a

Questions:

• - The licenses files need update.
• - There is breaking changes for older versions.
• - It needs documentation.

[wilfred-s]

Please open a jra for tracking the changes, see https://yunikorn.apache.org/community/how_to_contribute for the process

[alex-stiff]

Thanks, updated.

[pbacsko]

@alex-stiff thanks for the PR, I've always believed we need something like that.

Which part of the documentation have you read already?

[alex-stiff]

@alex-stiff thanks for the PR, I've always believed we need something like that.

Which part of the documentation have you read already?

Mostly this page - as I go through the rest of it I'll be taking a look at the other docs pages as well.