Fix Python custom rule example

Author: pynicolas

python-custom-rules/pom.xml

@@ -12,7 +12,7 @@
   <description>Python Custom Rules</description>
 
   <properties>
-    <sonar.python.version>2.0-SNAPSHOT</sonar.python.version> <!-- minimum version is 2.0, Custom Rules API is not available for 1.x -->
+    <sonar.python.version>3.15.0.9787</sonar.python.version>
   </properties>
   <dependencies>
     <dependency>

python-custom-rules/src/main/java/org/sonar/samples/python/checks/CustomPythonVisitorCheck.java

@@ -21,15 +21,15 @@
 
 import org.sonar.check.Priority;
 import org.sonar.check.Rule;
-import org.sonar.plugins.python.api.PythonCheckTree;
+import org.sonar.plugins.python.api.PythonVisitorCheck;
 import org.sonar.plugins.python.api.tree.FunctionDef;
 
 @Rule(
   key = CustomPythonVisitorCheck.RULE_KEY,
   priority = Priority.MINOR,
   name = "Python visitor check",
   description = "desc")
-public class CustomPythonVisitorCheck extends PythonCheckTree {
+public class CustomPythonVisitorCheck extends PythonVisitorCheck {
 
   public static final String RULE_KEY = "visitor";