Charts: fix OBS build

fixes #1409e0385fba6d2a9392210b6bbc5760ee09bfe7

Signed-off-by: Francesco Giudici <francesco.giudici@suse.com>
(cherry picked from commit 58951cc)

Author: fgiudici

.obs/chartfile/operator/values.yaml

@@ -27,7 +27,7 @@ global:
     systemDefaultRegistry: ""
 
 # used only if systemDefaultRegistry is empty
-registry_url: "%%IMG_REPO%%"
+registryUrl: "%%IMG_REPO%%"
 
 # enable debug output for operator
 debug: false