Fix enable-volume-image-dep-tests config option

Replaced hyphen with underscore in config option

Change-Id: I5a34b57809fe2b3ef94e3b4b2ae3a6ea23003c0f
diff --git a/releasenotes/notes/add-enable-volume-image-dep-tests-option-150b929d18da233f.yaml b/releasenotes/notes/add-enable-volume-image-dep-tests-option-150b929d18da233f.yaml
index 979f083..e78201e 100644
--- a/releasenotes/notes/add-enable-volume-image-dep-tests-option-150b929d18da233f.yaml
+++ b/releasenotes/notes/add-enable-volume-image-dep-tests-option-150b929d18da233f.yaml
@@ -1,6 +1,6 @@
 ---
 features:
   - |
-    Add new config option 'enable-volume-image-dep-tests' in section
+    Add new config option 'enable_volume_image_dep_tests' in section
     [volume-feature-enabled] which should be used in
     image<->volume<->snapshot dependency tests.