chore(deps): bump ch.qos.logback:logback-core

Bumps [ch.qos.logback:logback-core](https://github.com/qos-ch/logback) from 1.2.13 to 1.5.34.
- [Release notes](https://github.com/qos-ch/logback/releases)
- [Commits](qos-ch/logback@v_1.2.13...v_1.5.34)

---
updated-dependencies:
- dependency-name: ch.qos.logback:logback-core
  dependency-version: 1.5.34
  dependency-type: direct:production
...

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

Author: dependabot[bot]

java-showcase/gapic-showcase/pom.xml

@@ -19,8 +19,8 @@
   <properties>
     <gapic-showcase.version>0.44.0</gapic-showcase.version>
     <!-- This is the last version supporting slf4j 1.x, do not upgrade -->
-    <slf4j1-logback.version>1.2.13</slf4j1-logback.version>
-    <slf4j2-logback.version>1.5.25</slf4j2-logback.version>
+    <slf4j1-logback.version>1.5.34</slf4j1-logback.version>
+    <slf4j2-logback.version>1.5.34</slf4j2-logback.version>
   </properties>
 
   <build>