Chore(deps): Bump org.openrewrite.rewrite from 7.20.0 to 7.21.0 (#14393)

Bumps org.openrewrite.rewrite from 7.20.0 to 7.21.0.

---
updated-dependencies:
- dependency-name: org.openrewrite.rewrite
  dependency-version: 7.21.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Author: dependabot[bot]

build.gradle.kts

@@ -1,7 +1,7 @@
 plugins {
     id("org.jabref.gradle.base.repositories")
     id("org.jabref.gradle.feature.compile") // for openrewrite
-    id("org.openrewrite.rewrite") version "7.20.0"
+    id("org.openrewrite.rewrite") version "7.21.0"
     id("org.itsallcode.openfasttrace") version "3.1.0"
     id("org.cyclonedx.bom") version "3.0.2"
 }