Set Go version to 1.24 in release workflow

Author: cap10morgan

.github/workflows/release.yml

@@ -20,5 +20,6 @@ jobs:
       - uses: actions/checkout@v5
       - uses: grafana/plugin-actions/build-plugin@main
         with:
+          go-version: '1.24'
           policy_token: ${{ secrets.GRAFANA_ACCESS_POLICY_TOKEN }}
           attestation: true