Fix UpdateThreadPoolSettingsTests (#73199)

Small and obvious oversight from #73172

Author: original-brownbear

server/src/test/java/org/elasticsearch/threadpool/UpdateThreadPoolSettingsTests.java

@@ -121,7 +121,7 @@ public void testScalingExecutorType() throws InterruptedException {
             final int expectedMinimum = "generic".equals(threadPoolName) ? 4 : 1;
             assertThat(info(threadPool, threadPoolName).getMin(), equalTo(expectedMinimum));
             assertThat(info(threadPool, threadPoolName).getMax(), equalTo(10));
-            final long expectedKeepAlive = "generic".equals(threadPoolName) ? 30 : 300;
+            final long expectedKeepAlive = "generic".equals(threadPoolName) || Names.SNAPSHOT_META.equals(threadPoolName) ? 30 : 300;
             assertThat(info(threadPool, threadPoolName).getKeepAlive().seconds(), equalTo(expectedKeepAlive));
             assertEquals(info(threadPool, threadPoolName).getThreadPoolType(), ThreadPool.ThreadPoolType.SCALING);
             assertThat(threadPool.executor(threadPoolName), instanceOf(EsThreadPoolExecutor.class));