Fix missing golang update by dependbot (#1158)

Signed-off-by: Prajyot-Parab <[email protected]>

Author: Prajyot-Parab

.github/dependabot.yml

@@ -38,3 +38,8 @@ updates:
     directory: "/"
     schedule:
       interval: "weekly"
+
+  - package-ecosystem: "docker"
+    directory: "/hack/ccm"
+    schedule:
+      interval: "weekly"

hack/ccm/Dockerfile

@@ -14,12 +14,11 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-ARG GOLANG_IMAGE=golang:1.19.6
 ARG TARGETPLATFORM=linux/amd64
 ARG ARCH=amd64
 
 # Build IBM cloud controller manager binary
-FROM ${GOLANG_IMAGE} AS ccm-builder
+FROM golang:1.20.2 AS ccm-builder
 ARG ARCH
 ARG POWERVS_CLOUD_CONTROLLER_COMMIT
 WORKDIR /build