Update groovy monorepo to v4.0.28

Author: renovate[bot]

build.gradle

@@ -21,7 +21,7 @@ repositories {
 
 dependencies {
   // mandatory dependencies for using Spock
-  implementation platform('org.apache.groovy:groovy-bom:4.0.26')
+  implementation platform('org.apache.groovy:groovy-bom:4.0.28')
   implementation 'org.apache.groovy:groovy'
   testImplementation platform("org.spockframework:spock-bom:2.3-groovy-4.0")
   testImplementation "org.spockframework:spock-core"

pom.xml

@@ -11,7 +11,7 @@
   <properties>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
-    <groovy.version>4.0.26</groovy.version>
+    <groovy.version>4.0.28</groovy.version>
   </properties>
 
   <build>