Fix bug in message formatting

Change-Id: I0cbda0de5062b677b765d85300d7e6c5aa3b9866
diff --git a/src/main/java/com/googlesource/gerrit/plugins/quota/RateLimitUploadListener.java b/src/main/java/com/googlesource/gerrit/plugins/quota/RateLimitUploadListener.java
index 44cfd21..0b36ebb 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/quota/RateLimitUploadListener.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/quota/RateLimitUploadListener.java
@@ -132,7 +132,7 @@
       try {
         limiter = limitsPerAccount.get(accountId).get();
       } catch (ExecutionException e) {
-        String msg = MessageFormat.format("Cannot get rate limits for account ''{}''", accountId);
+        String msg = MessageFormat.format("Cannot get rate limits for account ''{0}''", accountId);
         log.warn(msg, e);
       }
     } else {