Fix typo in secrets name

Change-Id: I704fc23625e65aa4d605ce273d3b8c5ed93d52db
diff --git a/zuul.d/secrets.yaml b/zuul.d/secrets.yaml
index 6cd30d2..7d7893e 100644
--- a/zuul.d/secrets.yaml
+++ b/zuul.d/secrets.yaml
@@ -1,5 +1,5 @@
 - secret:
-    name: s3_secrets
+    name: s3-secrets
     data:
       bucket: zuul-logs
       access_key: zuul-logs