[dependency]: Bump com.diffplug.spotless:spotless-maven-plugin

Bumps the nis-dependencies group in /nis with 1 update: [com.diffplug.spotless:spotless-maven-plugin](https://github.com/diffplug/spotless).


Updates `com.diffplug.spotless:spotless-maven-plugin` from 2.44.1 to 2.44.2
- [Release notes](https://github.com/diffplug/spotless/releases)
- [Changelog](https://github.com/diffplug/spotless/blob/main/CHANGES.md)
- [Commits](diffplug/spotless@maven/2.44.1...maven/2.44.2)

---
updated-dependencies:
- dependency-name: com.diffplug.spotless:spotless-maven-plugin
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: nis-dependencies
...

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

nis/pom.xml

@@ -351,7 +351,7 @@
             <plugin>
                 <groupId>com.diffplug.spotless</groupId>
                 <artifactId>spotless-maven-plugin</artifactId>
-                <version>2.44.1</version>
+                <version>2.44.2</version>
                 <configuration>
                     <formats>
                         <format>