Improve specificity of our audit guidance

[paulirish]

We completed an exercise to rate the "guidance level" of our perf audits. And how specific the guidance was.

Guidance level descriptions

3: We give you specifics on what to fix and we tell you how to fix it
2: We give you specifics on what to fix but you will need to design a solution yourself
1: No specifics just a general overview, design a solution yourself

http://go/pzrvn

Items that we determined are a 1 suggest we could and should improve the status quo, whether in the audit results or our documentation.

Let's improve those, so developers are not stranded when attempting to take action.