Bump logback-core from 1.2.3 to 1.2.9

Bumps logback-core from 1.2.3 to 1.2.9.

---
updated-dependencies:
- dependency-name: ch.qos.logback:logback-core
  dependency-type: direct:production
...

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

pom.xml

@@ -56,7 +56,7 @@
         <spring.version>5.3.12</spring.version>
         <spring.boot.version>2.5.6</spring.boot.version>
         <java.version>1.8</java.version>
-        <logback.version>1.2.3</logback.version>
+        <logback.version>1.2.9</logback.version>
         <hadoop.version>2.7.3</hadoop.version>
         <quartz.version>2.3.2</quartz.version>
         <jackson.version>2.10.5</jackson.version>