Address review feedback

Author: janbuchar

docs/02_guides/pay_per_event.mdx renamed to docs/03_concepts/12_pay_per_event.mdx

@@ -38,7 +38,7 @@ When you plan to start using the pay-per-event pricing model for an Actor that i
 It is encouraged to test your monetization code on your machine before releasing it to the public. To tell your Actor that it should work in pay-per-event mode, pass it the `ACTOR_TEST_PAY_PER_EVENT` environment variable:
 
 ```shell
-ACTOR_TEST_PAY_PER_EVENT=true npm start
+ACTOR_TEST_PAY_PER_EVENT=true python -m youractor
 ```
 
 If you also wish to see a log of all the events charged throughout the run, the Apify SDK keeps a log of charged events in a so called charging dataset. Your charging dataset can be found under the `charging_log` name (unless you change your storage settings, this dataset is stored in `storage/datasets/charging_log/`). Please note that this log is not available when running the Actor in production on the Apify platform.

docs/02_guides/code/actor_charge.py renamed to docs/03_concepts/code/actor_charge.py

@@ -11,7 +11,7 @@ import useDocusaurusContext from '@docusaurus/useDocusaurusContext';
 
 const ApiLink = ({ to, children }) => {
     return (
-        <Link to={`/api/${to}`}>{children}</Link>
+        <Link to={`/reference/${to}`}>{children}</Link>
     );
 
     // const version = useDocsVersion();