Merge pull request #257 from chrysn-pull-requests/update-branches

ci: bump RIOT_BRANCH and VERSION_TAG to 2025.01-branch and 2025.04

Author: chrysn

.github/workflows/build.yml

@@ -36,8 +36,8 @@ jobs:
     name: Build and Test
     runs-on: ubuntu-latest
     env:
-      RIOT_BRANCH: '2024.01-branch'
-      VERSION_TAG: '2024.01'
+      RIOT_BRANCH: '2025.01-branch'
+      VERSION_TAG: '2025.04'
       DOCKER_REGISTRY: "${{ secrets.DOCKER_REGISTRY || 'local' }}"
 
     steps: