Bump ch.qos.logback:logback-core from 1.4.14 to 1.5.6

Bumps [ch.qos.logback:logback-core](https://github.com/qos-ch/logback) from 1.4.14 to 1.5.6.
- [Commits](qos-ch/logback@v_1.4.14...v_1.5.6)

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

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

ocpp-v1_6-test/pom.xml

@@ -77,7 +77,7 @@
 		<dependency>
 		    <groupId>ch.qos.logback</groupId>
 		    <artifactId>logback-core</artifactId>
-		    <version>1.4.14</version>
+		    <version>1.5.6</version>
             <scope>test</scope>
 		</dependency>
 		<dependency>

ocpp-v2-test/pom.xml

@@ -103,7 +103,7 @@
         <dependency>
             <groupId>ch.qos.logback</groupId>
             <artifactId>logback-core</artifactId>
-            <version>1.4.14</version>
+            <version>1.5.6</version>
             <scope>test</scope>
         </dependency>
         <dependency>

ocpp-v2_0-test/pom.xml

@@ -78,7 +78,7 @@
         <dependency>
             <groupId>ch.qos.logback</groupId>
             <artifactId>logback-core</artifactId>
-            <version>1.4.14</version>
+            <version>1.5.6</version>
             <scope>test</scope>
         </dependency>
         <dependency>