chore(deps): update dependency submariner to v0.21.0 (#5601)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/build-x86-image.yaml

@@ -28,7 +28,7 @@ env:
   # renovate: datasource=github-releases depName=helm packageName=helm/helm
   HELM_VERSION: v3.18.5
   # renovate: datasource=github-releases depName=submariner packageName=submariner-io/submariner
-  SUBMARINER_VERSION: 0.20.1
+  SUBMARINER_VERSION: 0.21.0
 
 jobs:
   build-kube-ovn-base:

.github/workflows/scheduled-e2e.yaml

@@ -16,7 +16,7 @@ env:
   # renovate: datasource=github-releases depName=helm packageName=helm/helm
   HELM_VERSION: v3.18.5
   # renovate: datasource=github-releases depName=submariner packageName=submariner-io/submariner
-  SUBMARINER_VERSION: 0.20.1
+  SUBMARINER_VERSION: 0.21.0
 
 jobs:
   k8s-conformance-e2e: