Bump org.igniterealtime.openfire:xmppserver from 4.8.0-beta to 4.8.1

Bumps [org.igniterealtime.openfire:xmppserver](https://github.com/igniterealtime/Openfire) from 4.8.0-beta to 4.8.1.
- [Release notes](https://github.com/igniterealtime/Openfire/releases)
- [Commits](igniterealtime/Openfire@v4.8.0beta...v4.8.1)

---
updated-dependencies:
- dependency-name: org.igniterealtime.openfire:xmppserver
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

pom.xml

@@ -33,7 +33,7 @@
         <dependency>
             <groupId>org.igniterealtime.openfire</groupId>
             <artifactId>xmppserver</artifactId>
-            <version>4.8.0-beta</version>
+            <version>4.8.1</version>
             <scope>provided</scope>
         </dependency>
     </dependencies>