Examples: Fixed the example path to correct value (#26255)
Examples: Fixed the example path to correct value (#26255)


## Documentation / Examples

- [x] Make sure the linting passes

Changes in readme.md:

The path to the example in ```create-next-app``` command was incorrectly specified as ```api-routes``` by the example author. 
Fixed this value to ```api-routes-rate-limit``` as well as app name to ```api-routes-rate-limit-app``` make this consistent with other examples.

No other changes made to example.
azukaru/next.js,azukaru/next.js,JeromeFitz/next.js,zeit/next.js,flybayer/next.js,JeromeFitz/next.js,JeromeFitz/next.js,flybayer/next.js,azukaru/next.js,azukaru/next.js,flybayer/next.js,zeit/next.js,JeromeFitz/next.js,flybayer/next.js,zeit/next.js