build(deps): Bump logback-classic from 1.2.3 to 1.2.6 (#191)

Bumps logback-classic from 1.2.3 to 1.2.6.

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

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Author: dependabot[bot]

pom.xml

@@ -11,7 +11,7 @@
   <properties>
     <kafka.version>2.8.0</kafka.version>
     <vertx.version>4.1.4</vertx.version>
-    <logback.version>1.2.3</logback.version>
+    <logback.version>1.2.6</logback.version>
     <jackson-databind.version>2.11.2</jackson-databind.version>
     <junit.version>5.7.2</junit.version>
     <hamcrest.version>2.2</hamcrest.version>