Build(deps): Bump ch.qos.logback:logback-classic from 1.6.3 to 1.6.4

Bumps [ch.qos.logback:logback-classic](https://github.com/qos-ch/logback) from 1.6.3 to 1.6.4.
- [Release notes](https://github.com/qos-ch/logback/releases)
- [Commits](qos-ch/logback@v_1.6.3...v_1.6.4)

---
updated-dependencies:
- dependency-name: ch.qos.logback:logback-classic
  dependency-version: 1.6.4
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

pom.xml

@@ -557,7 +557,7 @@
 			<!-- Change verbose logging of smile.stat.distribution.* -->
 			<groupId>ch.qos.logback</groupId>
 			<artifactId>logback-classic</artifactId>
-			<version>1.6.3</version>
+			<version>1.6.4</version>
 			<scope>runtime</scope>
 		</dependency>
 		<dependency>