chore(deps): Update dependency com.puppycrawl.tools:checkstyle to v12

[stoyanK7]

Updated Checkstyle version from 11.1.0 to latest 12.3.0.

Checkstyle 12.3.0 release notes

This pull request is same as PR #613, but also fixes the 7 Checkstyle violations from that PR:

Error: eckstyle] [ERROR] /home/runner/work/Configurate/Configurate/core/src/main/java/org/spongepowered/configurate/loader/package-info.java:17: First sentence of Javadoc is missing an ending period. [SummaryJavadoc]
Error: eckstyle] [ERROR] /home/runner/work/Configurate/Configurate/core/src/main/java/org/spongepowered/configurate/reactive/CachedPublisher.java:26: First sentence of Javadoc is missing an ending period. [SummaryJavadoc]
Error: eckstyle] [ERROR] /home/runner/work/Configurate/Configurate/core/src/main/java/org/spongepowered/configurate/serialize/Scalars.java:23: First sentence of Javadoc is missing an ending period. [SummaryJavadoc]
Error: eckstyle] [ERROR] /home/runner/work/Configurate/Configurate/core/src/main/java/org/spongepowered/configurate/serialize/NumericSerializers.java:22: First sentence of Javadoc is missing an ending period. [SummaryJavadoc]
Error: eckstyle] [ERROR] /home/runner/work/Configurate/Configurate/core/src/main/java/org/spongepowered/configurate/package-info.java:17: First sentence of Javadoc is missing an ending period. [SummaryJavadoc]
Error: eckstyle] [ERROR] /home/runner/work/Configurate/Configurate/core/src/main/java/org/spongepowered/configurate/transformation/package-info.java:17: First sentence of Javadoc is missing an ending period. [SummaryJavadoc]
Error: eckstyle] [ERROR] /home/runner/work/Configurate/Configurate/core/src/main/java/org/spongepowered/configurate/transformation/TransformAction.java:49: First sentence of Javadoc is missing an ending period. [SummaryJavadoc]

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Related to checkstyle/checkstyle#18301 where we want to bring Configurate project back into Checkstyle regression suite. See checkstyle/checkstyle#18301 (comment)

[romani]

@zml2008 , I am supporting this update.
We merged restoration in CI of your project.