Clarify NYC configration location

**Is your feature request related to a problem? Please describe.**
The docs should be clearer that the nyc configuration, whether in the package.json, .nycrc, etc, needs to be in the same directory where the cypress process runs. For example, in my case, I have Cypress Component Tests setup in a pnpm / nx monorepo in `libs/foo/cypress`. In order for the NYC settings to take affect, the config needs to be in `libs/foo/cypress/package.json`, `libs/foo/cypress/nyc.config.js`, etc because that's where the process runs (`cypress run --component --config-file=cypress/config.ts`). The docs are ambiguous because it makes it seem like the correct place is `libs/foo/package.json` with the rest of the project's dependencies, but they'll never get picked up there. I had to dig through the code to figure this out

**Describe the solution you'd like**
Clearer documentation

**Describe alternatives you've considered**
n/a

**Additional context**
n/a