[releng] Use newer version of jar signer.
diff --git a/releng/org.eclipse.emf.parent/pom.xml b/releng/org.eclipse.emf.parent/pom.xml
index a02eced..cb93624 100644
--- a/releng/org.eclipse.emf.parent/pom.xml
+++ b/releng/org.eclipse.emf.parent/pom.xml
@@ -12,7 +12,7 @@
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<tycho.scmUrl>scm:git:https://git.eclipse.org/r/p/emf/org.eclipse.emf.git</tycho.scmUrl>
<tycho-version>2.2.0</tycho-version>
- <jarsigner-version>1.1.7</jarsigner-version>
+ <jarsigner-version>1.3.1</jarsigner-version>
<javaVersion>11</javaVersion>
<os-jvm-flags/>
</properties>