[DL-13850] Added a note to the description of the penaltyChargeReference

[abutters]

field.

[platops-pr-bot]

• SBT can be updated to 1.9.9 in project/build.properties
• uk.gov.hmrc.sbt-auto-build can be updated to 3.22.0 in project/plugins.sbt
• SbtAutoBuildPlugin can be removed from build.sbt - it's been automatically enabled since 3.0.0
• STDOUT_IGNORE_NETTY appender (and usage) can be removed from conf/logback.xml - Netty server is no longer used (Since Play 2.6.x)
• ACCESS_LOG_FILE appender (and usage) can be removed from conf/logback.xml - it's never populated