fix: missing curly brace

Author: salvatore-campagna

server/src/internalClusterTest/java/org/elasticsearch/index/seqno/RetentionLeaseIT.java

@@ -336,7 +336,7 @@ public void testRetentionLeasesSyncOnRecovery() throws Exception {
             .getShardOrNull(new ShardId(resolveIndex("index"), 0));
         final int length = randomIntBetween(1, 8);
         final Map<String, RetentionLease> currentRetentionLeases = new LinkedHashMap<>();
-        logger.info("adding retention [{}}] leases", length);
+        logger.info("adding retention [{}] leases", length);
         for (int i = 0; i < length; i++) {
             final String id = randomValueOtherThanMany(currentRetentionLeases.keySet()::contains, () -> randomAlphaOfLength(8));
             final long retainingSequenceNumber = randomLongBetween(0, Long.MAX_VALUE);