build(deps): bump k8s-staging-sig-storage/objectstorage-controller

Bumps [k8s-staging-sig-storage/objectstorage-controller](https://github.com/kubernetes-sigs/container-object-storage-interface) from v20250704-controllerv0.2.0-rc1-76-gbb3817d to v20250801-controllerv0.2.0-rc1-90-g4e190cf.
- [Release notes](https://github.com/kubernetes-sigs/container-object-storage-interface/releases)
- [Changelog](https://github.com/kubernetes-sigs/container-object-storage-interface/blob/main/RELEASE.md)
- [Commits](https://github.com/kubernetes-sigs/container-object-storage-interface/commits)

---
updated-dependencies:
- dependency-name: k8s-staging-sig-storage/objectstorage-controller
  dependency-version: v20250801-controllerv0.2.0-rc1-90-g4e190cf
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

controller/resources/deployment.yaml

@@ -22,6 +22,6 @@ spec:
       serviceAccountName: controller-sa
       containers:
         - name: objectstorage-controller
-          image: gcr.io/k8s-staging-sig-storage/objectstorage-controller:v20250704-controllerv0.2.0-rc1-76-gbb3817d
+          image: gcr.io/k8s-staging-sig-storage/objectstorage-controller:v20250801-controllerv0.2.0-rc1-90-g4e190cf
           args:
             - "--v=5"