chore: Use latest ubi image tag (#506)

#### Motivation

#### Modifications

#### Result

Signed-off-by: Spolti <[email protected]>

Author: spolti

Dockerfile

@@ -51,7 +51,7 @@ RUN --mount=type=cache,target=/root/.cache/go-build \
 ###############################################################################
 # Stage 2: Copy build assets to create the smallest final runtime image
 ###############################################################################
-FROM registry.access.redhat.com/ubi8/ubi-minimal:8.9 AS runtime
+FROM registry.access.redhat.com/ubi8/ubi-minimal:latest AS runtime
 
 ARG USER=2000
 ARG IMAGE_VERSION

Dockerfile.develop

@@ -23,7 +23,8 @@
 ###############################################################################
 
 # TODO: replace the "go_toolset" build stage once ubi8/go-toolset:1.21 is available
-FROM registry.access.redhat.com/ubi8/ubi-minimal:8.9 as go-toolset
+# the go-toolset 1.21 is based on ubi9, we need to update it in the base image as well.
+FROM registry.access.redhat.com/ubi8/ubi-minimal:latest as go-toolset
 
 # https://docs.docker.com/engine/reference/builder/#automatic-platform-args-in-the-global-scope
 # We need TARGETOS and TARGETARCH (not BUILDOS and BUILDARCH) since the developer