Bump net.dv8tion:JDA from 5.0.0-beta.21 to 5.2.1

Bumps [net.dv8tion:JDA](https://github.com/discord-jda/JDA) from 5.0.0-beta.21 to 5.2.1.
- [Release notes](https://github.com/discord-jda/JDA/releases)
- [Commits](discord-jda/JDA@v5.0.0-beta.21...v5.2.1)

---
updated-dependencies:
- dependency-name: net.dv8tion:JDA
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

app/build.gradle

@@ -43,7 +43,7 @@ shadowJar {
 }
 
 dependencies {
-    implementation 'net.dv8tion:JDA:5.0.0-beta.21'
+    implementation 'net.dv8tion:JDA:5.2.1'
 
     implementation "com.theokanning.openai-gpt3-java:api:$chatGPTVersion"
     implementation "com.theokanning.openai-gpt3-java:service:$chatGPTVersion"