Bump logback-classic from 1.1.7 to 1.2.0 in /data-pipeline-examples

Bumps logback-classic from 1.1.7 to 1.2.0.

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

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

Author: dependabot[bot]

data-pipeline-examples/pom.xml

@@ -37,7 +37,7 @@
         <maven.minimum.version>3.3.1</maven.minimum.version>
         <exec-maven-plugin.version>1.4.0</exec-maven-plugin.version>
         <maven-shade-plugin.version>2.4.3</maven-shade-plugin.version>
-        <logback.version>1.1.7</logback.version>
+        <logback.version>1.2.0</logback.version>
         <scala.binary.version>2.11</scala.binary.version>
         <spark.version>2.4.3</spark.version>
     </properties>