Bump org.jreleaser from 1.20.0 to 1.21.0 (#49)

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

Author: dependabot[bot]

build.gradle.kts

@@ -14,7 +14,7 @@ plugins {
     id("io.freefair.maven-central.validate-poms") version "9.0.0"
     id("com.github.ben-manes.versions") version "0.53.0"
     id("ru.vyarus.pom") version "3.0.0"
-    id("org.jreleaser") version "1.20.0"
+    id("org.jreleaser") version "1.21.0"
     id("org.sonarqube") version "7.0.1.6134"
     id("me.champeau.jmh") version "0.7.3"
 }