Bump ch.qos.logback:logback-classic in /sample-code/docs-rest-tutorial

Bumps [ch.qos.logback:logback-classic](https://github.com/qos-ch/logback) from 1.0.13 to 1.3.12.
- [Commits](qos-ch/logback@v_1.0.13...v_1.3.12)

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

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

sample-code/docs-rest-tutorial/pom.xml

@@ -34,7 +34,7 @@
         <dependency>
             <groupId>ch.qos.logback</groupId>
             <artifactId>logback-classic</artifactId>
-            <version>1.0.13</version>
+            <version>1.3.12</version>
         </dependency>
         <!-- JUNIT 5 DEPENDENCY-->
         <dependency>