Bump org.jreleaser from 1.20.0 to 1.21.0 (#730)

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
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

build.gradle

@@ -3,7 +3,7 @@ plugins {
     id "io.freefair.lombok" apply false
     id "io.freefair.javadocs" apply false
     id "base"
-    id 'org.jreleaser' version '1.20.0'
+    id 'org.jreleaser' version '1.21.0'
 }
 
 allprojects {