POM: Specify the GnuPG signing key by key ID.

Change-Id: I79c3978ae376992e70aae575dc2e12c532aba446
diff --git a/jgvariant-parent/pom.xml b/jgvariant-parent/pom.xml
index 283c62a..8afd030 100644
--- a/jgvariant-parent/pom.xml
+++ b/jgvariant-parent/pom.xml
@@ -383,7 +383,7 @@
             <artifactId>maven-gpg-plugin</artifactId>
             <version>${maven-gpg-plugin.version}</version>
             <configuration>
-              <keyname>code@mulk.eu</keyname>
+              <keyname>44DD0CEE515E547A0ABAB1D24F2E30DF0A270EFB</keyname>
             </configuration>
             <executions>
               <execution>