Bump log4j-core from 2.13.3 to 2.15.0 in /simple-logger#21

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dependabot/maven/simple-logger/org.apache.logging.log4j-log4j-core-2.15.0cnkeeper/simple-framework:dependabot/maven/simple-logger/org.apache.logging.log4j-log4j-core-2.15.0Copy head branch name to clipboard