⬆️ Update grafana/grafana to v12.3.0 (#488)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

grafana/Dockerfile

@@ -7,7 +7,7 @@ SHELL ["/bin/bash", "-o", "pipefail", "-c"]
 
 # Setup base system
 ARG BUILD_ARCH=amd64
-ARG GRAFANA_VERSION="v12.2.1"
+ARG GRAFANA_VERSION="v12.3.0"
 ARG GRAFANA_IMAGE_RENDERER_VERSION="v4.1.5"
 RUN \
     ARCH="${BUILD_ARCH}" \