Fix grammar and apply technical writing best practices

What does this MR do and why?

This MR fixes some grammar mistakes and applies some technical writing best practices to make the refinement comment easier to read.

Expected impact & dry-runs

None. Just text changes.

Action items

• [ ] If adding environment variables for reactive processors, update config/triage-web.yaml and .gitlab/ci/triage-web.yml
• [ ] (If applicable) Add documentation to the handbook pages for Triage Operations =>
• (If applicable) Identify the affected groups and how to communicate to them:
  • /cc @kniechajewicz