Bump nexus-staging-maven-plugin from 1.6.12 to 1.6.13

Bumps nexus-staging-maven-plugin from 1.6.12 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] <[email protected]>

Author: dependabot[bot]

pom.xml

@@ -203,7 +203,7 @@
                 <plugin>
                     <groupId>org.sonatype.plugins</groupId>
                     <artifactId>nexus-staging-maven-plugin</artifactId>
-                    <version>1.6.12</version>
+                    <version>1.6.13</version>
                 </plugin>
                 <plugin>
                     <groupId>org.apache.maven.plugins</groupId>