Increase cluster publish timeout in flaky test testStaleClusterManagerNotHijackingMajority (#13463) (#13513)

(cherry picked from commit 3b0cd0a)

Signed-off-by: Rahul Karajgikar <[email protected]>
Signed-off-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>
Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>
Co-authored-by: Rahul Karajgikar <[email protected]>

Author: 3 people

server/src/internalClusterTest/java/org/opensearch/discovery/StableClusterManagerDisruptionIT.java

@@ -203,7 +203,7 @@ public void testStaleClusterManagerNotHijackingMajority() throws Exception {
             3,
             Settings.builder()
                 .put(LeaderChecker.LEADER_CHECK_TIMEOUT_SETTING.getKey(), "1s")
-                .put(Coordinator.PUBLISH_TIMEOUT_SETTING.getKey(), "1s")
+                .put(Coordinator.PUBLISH_TIMEOUT_SETTING.getKey(), "2s")
                 .build()
         );
         ensureStableCluster(3);