Hack the go.mod in the build action

We cannot change the go version to 1.24+ in the go.mod because of Debian
12's old go. In order to force the checks for go1.25 replace it on the
fly in the `go.mod`. This should trigger more checks as documented in
https://tip.golang.org/doc/go1.24#vet

Author: cbosdo

.github/workflows/build.yml

@@ -1,4 +1,4 @@
-# SPDX-FileCopyrightText: 2023 SUSE LLC
+# SPDX-FileCopyrightText: 2026 SUSE LLC
 #
 # SPDX-License-Identifier: Apache-2.0
 
@@ -40,6 +40,11 @@ jobs:
           offset=$(git rev-list --count ${tag}..)
           echo "VERSION=$tag-$offset" >> "$GITHUB_ENV"
 
+      - name: Hack go.mod
+        run: |
+          # Hack the go.mod to check that it really builds on 1.25
+          sed -i 's/go [0-9.]\+/go 1.25.0/' go.mod
+
       - name: Build
         run: |
           mkdir -p ./bin