Apply suggestion from @sbernauer

sbernauer · web-flow · commit 6329758043fe · 2026-01-19T08:38:15.000+01:00
diff --git a/tests/templates/kuttl/iceberg/31-assert.yaml b/tests/templates/kuttl/iceberg/31-assert.yaml
@@ -1,3 +1,4 @@
+---
 apiVersion: kuttl.dev/v1beta1
 kind: TestAssert
 timeout: 300
