Bump net.alchim31.maven:scala-maven-plugin from 3.1.3 to 4.8.1

Dependabot couldn't find the original pull request head commit, 97f5210.

querydsl-scala/pom.xml

@@ -153,7 +153,7 @@
       <plugin>
         <groupId>net.alchim31.maven</groupId>
         <artifactId>scala-maven-plugin</artifactId>
-        <version>3.4.6</version>
+        <version>4.8.1</version>
         <configuration>
           <charset>${character.encoding}</charset>
           <scalaVersion>${scala.full.version}</scalaVersion>