Update changelog format

CHANGELOG.md

@@ -1,46 +1,46 @@
 # Changelog
 
-## 1.7 (2023-05-24)
+## [1.7] - 2023-05-24
 
 * Fixed check whether advancement should be sent to Matterbridge
 * Removed requirement of explicitly providing a list of advancements (advancements.yml)
 
 **Note:** The plugin now requires at least Minecraft 1.19 as the new features depend on a feature only available since 1.19.
 
-## 1.6 (2022-06-07)
+## [1.6] - 2022-06-07
 
 Updated list of advancements from https://minecraft.gamepedia.com/Advancement to add those added in Minecraft 1.19 (thanks to @Millesimus)
 
-## 1.5.1 (2022-05-21)
+## [1.5.1] - 2022-05-21
 
 * Removed logging for avatar URL while sending messages
 * Updated gson library to version 2.9.0 (fix for CVE-2022-25647)
 
-## 1.5 (2021-12-04)
+## [1.5] - 2021-12-04
 
 Updated list of advancements from https://minecraft.gamepedia.com/Advancement to add those added in Minecraft 1.18 (thanks to @Millesimus)
 
-## 1.4 (2021-06-21)
+## [1.4] - 2021-06-21
 
 Updated list of advancements from https://minecraft.gamepedia.com/Advancement to add those added in Minecraft 1.17 (thanks to @Millesimus)
 
-## 1.3.1 (2021-06-04)
+## [1.3.1] - 2021-06-04
 
 Upgraded org.apache.httpcomponents:httpclient dependency to fix security vulnerability CVE-2020-13956.
 
-## 1.3 (2021-04-02)
+## [1.3] - 2021-04-02
 
 Updated list of advancements from https://minecraft.gamepedia.com/Advancement (thanks to @Millesimus)
 
-## 1.2 (2021-03-21)
+## [1.2] - 2021-03-21
 
 * Corrected and added some advancements (thanks to @Millesimus)
 * Check if outgoing.chat.enable in config.yml is enabled (thanks to @Millesimus)
 
-## 1.1 (2021-03-18)
+## [1.1] - 2021-03-18
 
 Fixed sending "§e" before playername in join/quit messages (fixes #4)
 
-## 1.0 (2020-09-02)
+## [1.0] - 2020-09-02
 
 Initial release