Bump log4j-api from 2.11.0 to 2.15.0 in /samples/03.welcome-user#32

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dependabot/maven/samples/03.welcome-user/org.apache.logging.log4j-log4j-api-2.15.0admdev8/botbuilder-java:dependabot/maven/samples/03.welcome-user/org.apache.logging.log4j-log4j-api-2.15.0Copy head branch name to clipboard