typo fix (#117)

docs/modules/tutorials/pages/beginner/hello_main_event_loop.adoc

@@ -98,7 +98,7 @@ Here you change their properties to update the game state (repeatedly).
 
 [TIP]
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-Everything in a game happens either during initialization, or during the update loop. This means that these two methods grow very long over time. Follwo these two strategies to spread out init and update code over several modular Java classes:
+Everything in a game happens either during initialization, or during the update loop. This means that these two methods grow very long over time. Follow these two strategies to spread out init and update code over several modular Java classes:
 
 *  Move code blocks from the simpleInitApp() method to xref:core:app/state/application_states.adoc[AppStates].
 *  Move code blocks from the simpleUpdate() method to xref:core:scene/control/custom_controls.adoc[Custom Controls].