build(deps): Bump com.github.twitch4j:twitch4j from 1.19.0 to 1.20.0

Bumps [com.github.twitch4j:twitch4j](https://github.com/twitch4j/twitch4j) from 1.19.0 to 1.20.0.
- [Release notes](https://github.com/twitch4j/twitch4j/releases)
- [Commits](twitch4j/twitch4j@v1.19.0...v1.20.0)

---
updated-dependencies:
- dependency-name: com.github.twitch4j:twitch4j
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

build.gradle.kts

@@ -23,7 +23,7 @@ dependencies {
   implementation("org.springdoc:springdoc-openapi-starter-webmvc-ui:2.3.0")
   implementation("org.modelmapper:modelmapper:3.2.0")
   implementation("org.postgresql:postgresql:42.7.1")
-  implementation("com.github.twitch4j:twitch4j:1.19.0")
+  implementation("com.github.twitch4j:twitch4j:1.20.0")
 
   testImplementation("com.google.truth:truth:1.4.2")
   testImplementation("org.mockito:mockito-core:5.10.0")