Fix golang version in image-build action

Author: vkmc

.github/workflows/tests.yml

@@ -77,7 +77,7 @@ jobs:
       - uses: actions/checkout@v4.1.3
       - uses: actions/setup-go@v5
         with:
-          go-version: '1.21.13'
+          go-version: '1.24.11'
       - name: Verify image builds
         run: |
           docker build --tag infrawatch/sg-core:latest --file build/Dockerfile .