test: Set packaging to pom in test data

Author: fabapp2

components/sbm-core/src/test/java/org/springframework/sbm/build/migration/actions/AddMavenDependencyManagementActionTest.java

@@ -160,7 +160,7 @@ void shouldAddToRootPomInSingleModuleProject() {
                         "    <modelVersion>4.0.0</modelVersion>\n" +
                         "    <groupId>org.springframework.sbm.examples</groupId>\n" +
                         "    <artifactId>artifact-id</artifactId>\n" +
-                        "    <packaging>jar</packaging>\n" +
+                        "    <packaging>pom</packaging>\n" +
                         "    <version>0.0.1-SNAPSHOT</version>\n" +
                         "</project>\n";
 
@@ -171,7 +171,7 @@ void shouldAddToRootPomInSingleModuleProject() {
                         "    <modelVersion>4.0.0</modelVersion>\n" +
                         "    <groupId>org.springframework.sbm.examples</groupId>\n" +
                         "    <artifactId>artifact-id</artifactId>\n" +
-                        "    <packaging>jar</packaging>\n" +
+                        "    <packaging>pom</packaging>\n" +
                         "    <version>0.0.1-SNAPSHOT</version>\n" +
                         "    <dependencyManagement>\n" +
                         "        <dependencies>\n" +