chore(deps): update golang docker tag to v1.25.4 (#305)

Co-authored-by: Renovate Bot <[email protected]>

Author: jheuel

Dockerfile

@@ -7,7 +7,7 @@ RUN deno install
 RUN deno task build
 
 # Stage 2: Build the Go backend
-FROM golang:1.25.3@sha256:6d4e5e74f47db00f7f24da5f53c1b4198ae46862a47395e30477365458347bf2 as backend-builder
+FROM golang:1.25.4@sha256:5d73b7b83dd6e0258ff62832c93b6ea208fbb7727985d265fb49f75f81fc3d1f as backend-builder
 
 WORKDIR /app/backend
 COPY ./backend .