Add swift-nio back into the main scheme

Author: shahmishal

utils/update_checkout/update-checkout-config.json

@@ -141,6 +141,7 @@
                 "swift-docc-render-artifact": "main",
                 "swift-docc-symbolkit": "main",
                 "swift-markdown": "main",
+                "swift-nio": "2.31.2",
                 "swift-experimental-string-processing": "swift/main",
                 "wasi-libc": "wasi-sdk-20",
                 "wasmkit": "0.0.3",