bumped min go github action version to 1.26.4

.github/workflows/release.yaml

@@ -28,7 +28,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v6
         with:
-          go-version: '>=1.26.3'
+          go-version: '>=1.26.4'
 
       # This step usually is not needed because the /ui/dist is pregenerated locally
       # but its here to ensure that each release embeds the latest admin ui artifacts.