Bump net.kyori:adventure-text-minimessage from 4.19.0 to 4.21.0

Bumps [net.kyori:adventure-text-minimessage](https://github.com/KyoriPowered/adventure) from 4.19.0 to 4.21.0.
- [Release notes](https://github.com/KyoriPowered/adventure/releases)
- [Commits](PaperMC/adventure@v4.19.0...v4.21.0)

---
updated-dependencies:
- dependency-name: net.kyori:adventure-text-minimessage
  dependency-version: 4.21.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

build.gradle

@@ -33,7 +33,7 @@ dependencies {
     implementation("eu.okaeri:okaeri-configs-serdes-commons:5.0.0-beta.5")
 
     implementation("net.kyori:adventure-platform-bukkit:4.3.4")
-    implementation("net.kyori:adventure-text-minimessage:4.19.0")
+    implementation("net.kyori:adventure-text-minimessage:4.21.0")
 
     implementation("dev.rollczi:litecommands-bukkit:3.9.7")
     implementation("dev.rollczi:litecommands-annotations:3.9.7")