docker: Updating golang version

[neo-th]

Issue

Encountered this error while building the docker image with golang:1.22.

Step 5/14 : RUN go mod download
 ---> Running in a1de3653beb5
go: errors parsing go.mod:
go.mod:7: unknown block type: tool
The command '/bin/sh -c go mod download' returned a non-zero code: 1

Fix

Updated the Docker image to golang:1.25, since the tool directive in go.mod is supported starting in Go 1.24+.