Upgrade base image from UBI 8 to UBI 9

Author: ruivieira

Dockerfile

@@ -26,7 +26,7 @@ RUN CGO_ENABLED=0 GOOS=${TARGETOS:-linux} GOARCH=${TARGETARCH} go build -a -o ma
 
 # Use distroless as minimal base image to package the manager binary
 # Refer to https://github.com/GoogleContainerTools/distroless for more details
-FROM registry.access.redhat.com/ubi8/ubi-minimal:latest
+FROM registry.access.redhat.com/ubi9/ubi-minimal:latest
 WORKDIR /
 COPY --from=builder /workspace/manager .
 USER 65532:65532