Enhance some performance guideline titles
What does this MR do?
This enhances a few performance guideline titles in the development README, making it easier to understand what topics they cover.
Related issues
https://gitlab.com/gitlab-org/release/framework/issues/7
Author's checklist
Review checklist
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Your team's review (required) -
PM's review (recommended, but not a blocker)My team doesn't have a PM -
Technical writer's review (required)
Edited by Yorick Peterse