chore(deps): update dockerfile

| datasource | package | from   | to     |
| ---------- | ------- | ------ | ------ |
| docker     | golang  | 1.25.3 | 1.25.4 |


Signed-off-by: renovate-sh-app[bot] <219655108+renovate-sh-app[bot]@users.noreply.github.com>

Author: renovate-sh-app[bot]

Dockerfile

@@ -3,7 +3,7 @@
 #        -> Why static linking? We want to ensure we can switch base-image with little to no effort.
 #   2. It builds a running environment. This is the environment that exists for the Go binary, and should have all necessary pieces to run the application.
 
-FROM golang:1.25.3-alpine@sha256:aee43c3ccbf24fdffb7295693b6e33b21e01baec1b2a55acc351fde345e9ec34 AS app
+FROM golang:1.25.4-alpine@sha256:d3f0cf7723f3429e3f9ed846243970b20a2de7bae6a5b66fc5914e228d831bbb AS app
 
 RUN apk add --no-cache git
 
@@ -16,7 +16,7 @@ RUN --mount=type=cache,target=/go/pkg/mod CGO_ENABLED=0 go build \
   -ldflags '-s -w -extldflags "-static"' \
   .
 
-FROM debian:13@sha256:01a723bf5bfb21b9dda0c9a33e0538106e4d02cce8f557e118dd61259553d598 AS output_image
+FROM debian:13@sha256:8f6a88feef3ed01a300dafb87f208977f39dccda1fd120e878129463f7fa3b8f AS output_image
 
 LABEL maintainer="Grafana team <[email protected]>"
 LABEL org.opencontainers.image.source="https://github.com/grafana/grafana-image-renderer/tree/master/Dockerfile"