fix: vale h1 warnings

Author: JMatej

sources/academy/platform/getting_started/actors.md

@@ -5,7 +5,7 @@ sidebar_position: 1
 slug: /getting-started/actors
 ---
 
-# Actors {#actors}
+## Actors {#actors}
 
 **What is an Actor? How do we create them? Learn the basics of what Actors are, how they work, and try out an Actor yourself right on the Apify platform!**
 

sources/academy/platform/getting_started/creating_actors.md

@@ -5,7 +5,7 @@ sidebar_position: 2
 slug: /getting-started/creating-actors
 ---
 
-# Creating Actors {#creating-actors}
+## Creating Actors {#creating-actors}
 
 **This lesson offers hands-on experience in building and running Actors in Apify Console using a template. By the end of it, you will be able to build and run your first Actor using an Actor template.**
 

sources/academy/platform/getting_started/inputs_outputs.md

@@ -5,7 +5,7 @@ sidebar_position: 3
 slug: /getting-started/inputs-outputs
 ---
 
-# Inputs & outputs {#inputs-outputs}
+## Inputs & outputs {#inputs-outputs}
 
 **Create an Actor from scratch which takes an input, processes that input, and then outputs a result that can be used elsewhere.**