fix(deps): update dependency net.logstash.logback:logstash-logback-encoder to v8.1

Author: renovate[bot]

captchaservice-backend/pom.xml

@@ -27,7 +27,7 @@
         <spring-cloud-dependencies.version>2024.0.1</spring-cloud-dependencies.version> <!-- Must match the chosen Spring Boot version -->
 
         <!-- Logging -->
-        <logstash-logback-encoder.version>8.0</logstash-logback-encoder.version>
+        <logstash-logback-encoder.version>8.1</logstash-logback-encoder.version>
 
         <!-- Linting & Formatting -->
         <spotless-maven-plugin.version>2.28.0</spotless-maven-plugin.version>