chore: Adds collapsible yearly sections for changelog

PokemonTabletopAdventures_v3/README.md

@@ -30,6 +30,9 @@ Things we want to add to the character sheet, presented in no particular order o
   - Added support for scatter attacks that hit up to 10 times
   - Clarified the intent of each scatter type selection by explicitly stating how many hits are in each roll
 
+<details>
+  <summary><u>Expand for 2022 Changes</u></summary>
+  
 ### Aug 11, 2022
 - Implemented the ability to change the background and roll template colours for class and origin features, accessible to Trainer and Hybrid character types
 
@@ -76,6 +79,11 @@ Current mobile bugs that I'm pretty sure are roll20 bugs:
 - Stat in parenthesis for skill checks doesn't populate
 - The roll20 dice font is not available
 
+</details>
+
+<details>
+  <summary><u>Expand for 2021 Changes</u></summary>
+
 ### Jul 17th, 2021
 - Added a level field to the `hybrid` _(or Pokémon (Character Class))_ character type.
   - Uses the `level1` attribute, so it matches what is shown in the main class for the Trainer character type.
@@ -167,6 +175,11 @@ Current mobile bugs that I'm pretty sure are roll20 bugs:
 - Added a quick roll button that rolls a move without any query boxes for temporary modifiers or effectiveness, rolling with +0/+0/Neutral values
 - Streamlined move displays to show the configuration only when desired via a collapsible control
 
+</details>
+
+<details>
+<summary><u>Expand for 2020 Changes</u></summary>
+
 ### Dec 12, 2020
 
 - Migrated the character sheet style attributes to new fields
@@ -253,4 +266,6 @@ Current mobile bugs that I'm pretty sure are roll20 bugs:
 
 ### Sept 16, 2020
 
-- Initial Commit
+- Initial Commit
+
+</details>