Update slf4j monorepo from v1.7.36 to v2

Author: renovate[bot]

gbfs-validator-java/pom.xml

@@ -54,7 +54,7 @@
         <schemaVersion>3.0</schemaVersion>
 
         <everit-json-schema.version>1.14.5</everit-json-schema.version>
-        <slf4j.version>1.7.36</slf4j.version>
+        <slf4j.version>2.0.16</slf4j.version>
 
         <jacoco-maven-plugin.version>0.8.12</jacoco-maven-plugin.version>
         <nexus-staging-maven-plugin.version>1.6.13</nexus-staging-maven-plugin.version>