Update release-multicluster-cli.yaml

Author: slaskawi

.github/workflows/release-multicluster-cli.yaml

@@ -15,7 +15,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v4
         with:
-          go-version: '1.20'
+          go-version: '1.21'
       - name: Run GoReleaser
         uses: goreleaser/goreleaser-action@v4
         with: