Upgrade Checkstyle 12.2.0 -> 12.3.0 (#2035)

See:
- https://checkstyle.sourceforge.io/releasenotes.html
- https://github.com/checkstyle/checkstyle/releases/tag/checkstyle-12.3.0
- checkstyle/checkstyle@checkstyle-12.2.0...checkstyle-12.3.0

Author: Picnic-DevPla-Bot

pom.xml

@@ -929,7 +929,7 @@
                         <dependency>
                             <groupId>com.puppycrawl.tools</groupId>
                             <artifactId>checkstyle</artifactId>
-                            <version>12.2.0</version>
+                            <version>12.3.0</version>
                         </dependency>
                         <dependency>
                             <groupId>io.spring.nohttp</groupId>