Bump org.openjdk.nashorn:nashorn-core from 15.6 to 15.7

Bumps [org.openjdk.nashorn:nashorn-core](https://github.com/openjdk/nashorn) from 15.6 to 15.7.
- [Changelog](https://github.com/openjdk/nashorn/blob/main/CHANGELOG.md)
- [Commits](openjdk/nashorn@release-15.6...release-15.7)

---
updated-dependencies:
- dependency-name: org.openjdk.nashorn:nashorn-core
  dependency-version: '15.7'
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

pom.xml

@@ -150,7 +150,7 @@
     <!-- dependency versions -->
     <bnd.annotation.version>7.1.0</bnd.annotation.version>
     <log4j.version>2.25.1</log4j.version>
-    <nashorn.version>15.6</nashorn.version>
+    <nashorn.version>15.7</nashorn.version>
     <osgi.annotation.bundle.version>2.0.0</osgi.annotation.bundle.version>
     <osgi.annotation.versioning.version>1.1.2</osgi.annotation.versioning.version>
     <spotbugs-annotations.version>4.9.4</spotbugs-annotations.version>