build(deps): bump org.jreleaser from 1.20.0 to 1.21.0

Bumps org.jreleaser from 1.20.0 to 1.21.0.

---
updated-dependencies:
- dependency-name: org.jreleaser
  dependency-version: 1.21.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

build.gradle

@@ -3,7 +3,7 @@ plugins {
     id 'maven-publish'
     id 'signing'
     id 'io.github.gradle-nexus.publish-plugin' version '2.0.0'
-    id 'org.jreleaser' version '1.20.0'
+    id 'org.jreleaser' version '1.21.0'
     id 'org.gradle.test-retry' version "1.6.2"
 }