Set the target file in the Model

This is necessary so `maven-model-helper` can know which pom.xml the change refers to.

- Fixes quarkusio#40853

independent-projects/bootstrap/maven-resolver/src/main/java/io/quarkus/bootstrap/resolver/maven/workspace/ModelUtils.java

@@ -232,7 +232,9 @@ private static Properties loadPomProps(Path appJar, Path artifactIdPath) throws
     }
 
     public static Model readModel(final Path pomXml) throws IOException {
-        return readModel(Files.newInputStream(pomXml));
+        Model model = readModel(Files.newInputStream(pomXml));
+        model.setPomFile(pomXml.toFile());
+        return model;
     }
 
     public static Model readModel(InputStream stream) throws IOException {