Bump org.sonatype.plugins:nexus-staging-maven-plugin

Bumps org.sonatype.plugins:nexus-staging-maven-plugin from 1.6.7 to 1.6.13.

---
updated-dependencies:
- dependency-name: org.sonatype.plugins:nexus-staging-maven-plugin
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Change-Id: If7e4d22353a48de8adcaf86779db8d3878a69e91
diff --git a/pom.xml b/pom.xml
index 0efc99c..d4ce1e2 100644
--- a/pom.xml
+++ b/pom.xml
@@ -342,7 +342,7 @@
             <plugin>
                 <groupId>org.sonatype.plugins</groupId>
                 <artifactId>nexus-staging-maven-plugin</artifactId>
-                <version>1.6.7</version>
+                <version>1.6.13</version>
                 <extensions>true</extensions>
                 <configuration>
                     <serverId>korap</serverId>