[8.x] Fix off-by-one error in RecoverySourcePruneMergePolicyTests#testPruneSome

Backports #118944 to 8.x

Author: arteam

server/src/test/java/org/elasticsearch/index/engine/RecoverySourcePruneMergePolicyTests.java

@@ -44,7 +44,7 @@
 import java.util.stream.Collectors;
 
 import static org.hamcrest.Matchers.equalTo;
-import static org.hamcrest.Matchers.greaterThan;
+import static org.hamcrest.Matchers.greaterThanOrEqualTo;
 
 public class RecoverySourcePruneMergePolicyTests extends ESTestCase {
 
@@ -191,7 +191,7 @@ public void testPruneSome() throws IOException {
                                     }
                                     assertEquals(i, extra_source.docID());
                                     if (syntheticRecoverySource) {
-                                        assertThat(extra_source.longValue(), greaterThan(10L));
+                                        assertThat(extra_source.longValue(), greaterThanOrEqualTo(10L));
                                     } else {
                                         assertThat(extra_source.longValue(), equalTo(1L));
                                     }