Change invocationCount to private in CacheTest

Updated the visibility of the invocationCount field from public static to private in CacheTest to improve encapsulation and restrict access.

Author: baflQA

testng-core/src/test/java/test/dataprovider/issue3236/CacheTest.java

@@ -11,7 +11,7 @@
 
 public class CacheTest {
 
-  public static final AtomicInteger invocationCount = new AtomicInteger(0);
+  private final AtomicInteger invocationCount = new AtomicInteger(0);
   private String currentUuid;
 
   @Test(dataProvider = "dp", retryAnalyzer = MyRetry.class)