ci: Bumps Go release version

Author: NeedleInAJayStack

.github/workflows/release.yml

@@ -17,5 +17,6 @@ jobs:
 
       - uses: grafana/plugin-actions/build-plugin@main
         with:
+          go-version: "1.26"
           policy_token: ${{ secrets.GRAFANA_ACCESS_POLICY_TOKEN }}
-          attestation: true
+          attestation: true