chore(deps): update dependency net.alchim31.maven:scala-maven-plugin to v4 (#542)

Co-authored-by: renovatebot-confluentinc[bot] <169726756+renovatebot-confluentinc[bot]@users.noreply.github.com>

Author: renovatebot-confluentinc[bot]

pom.xml

@@ -320,7 +320,7 @@
                 <plugin>
                     <groupId>net.alchim31.maven</groupId>
                     <artifactId>scala-maven-plugin</artifactId>
-                    <version>3.2.1</version>
+                    <version>4.9.5</version>
                     <configuration>
                         <scalaCompatVersion>${kafka.scala.version}</scalaCompatVersion>
                         <scalaVersion>${scala.version}</scalaVersion>
@@ -373,7 +373,7 @@
             <plugin>
                 <groupId>net.alchim31.maven</groupId>
                 <artifactId>scala-maven-plugin</artifactId>
-                <version>3.2.1</version>
+                <version>4.9.5</version>
                 <configuration>
                     <args>
                         <!--