Bump nexus-staging-maven-plugin from 1.6.8 to 1.6.13

Bumps nexus-staging-maven-plugin from 1.6.8 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>

Author: dependabot[bot]

pom.xml

@@ -491,7 +491,7 @@
 					<plugin>
 						<groupId>org.sonatype.plugins</groupId>
 						<artifactId>nexus-staging-maven-plugin</artifactId>
-						<version>1.6.8</version>
+						<version>1.6.13</version>
 						<extensions>true</extensions>
 						<configuration>
 							<serverId>ossrh</serverId>