🌱 Update Cspo Image group to v1.23.6

| datasource | package                  | from   | to     |
| ---------- | ------------------------ | ------ | ------ |
| docker     | docker.io/library/golang | 1.23.5 | 1.23.6 |

Author: cluster-stack-bot[bot]

images/cspo/Dockerfile

@@ -13,7 +13,7 @@
 # limitations under the License.
 
 # Build the manager binary
-FROM --platform=${BUILDPLATFORM} docker.io/library/golang:1.23.5-bullseye as build
+FROM --platform=${BUILDPLATFORM} docker.io/library/golang:1.23.6-bullseye as build
 ARG TARGETOS TARGETARCH
 
 COPY . /src/cluster-stack-provider-openstack