fix heading capitalization

Author: TC-MO

sources/platform/actors/publishing/monetize.mdx

@@ -11,7 +11,7 @@ sidebar_position: 2
 
 Apify Store allows you to monetize your web scraping and automation projects by publishing them as Paid Actors. This guide explains the available pricing models and how to get started.
 
-## Pricing Models
+## Pricing models
 
 Actors in the Apify Store can be published under one of the following pricing models:
 
@@ -20,7 +20,7 @@ Actors in the Apify Store can be published under one of the following pricing mo
 3. **Pay per Result**: Users don't pay for the platform usage costs. Instead, they pay the developer based on the number of results produced by the Actor.
 4. **Pay per Event**: Users don't pay for the platform usage cost the Actor generates. Instead, they pay based on specific events defined by the developer, such as generating a single result or initiating the Actor.
 
-### Rental Pricing Model
+### Rental pricing model
 
 With the rental model, you can specify a free trial period and a monthly rental price. After the trial, users with an [Apify paid plan](https://apify.com/pricing) can continue using your Actor by paying the monthly fee. You can receive 80% of the total rental fees collected each month.
 
@@ -36,7 +36,7 @@ You make your Actor rental with 7 days free trial and then $30/month. During the
 The first user pays their first rent 7 days after the free trial, i.e., on 22nd. The second user only starts paying the rent next month. The third user is on Apify free plan, so after the free trial ends on 27th, they are not charged and cannot use the Actor further until they get a paid plan. Your profit is computed only from the first user. They were charged $30, so 80% of this goes to you, i.e., _0.8 * 30 = $24_.
 </details>
 
-### Pay-per-Result Pricing Model
+### Pay-per-Result pricing model
 
 In this model, you set a price per 1000 results. Users are charged based on the number of results your Actor produces. Your profit is calculated as 80% of the revenue minus platform usage costs. The formula is: