Updated base runtime to provided.al2

Author: mattrjacobs

index.js

@@ -13,7 +13,7 @@ const { mkdirSync, writeFileSync, readFileSync } = require("fs");
 const DEFAULT_DOCKER_TAG = "latest";
 const DEFAULT_DOCKER_IMAGE = "softprops/lambda-rust";
 const RUST_RUNTIME = "rust";
-const BASE_RUNTIME = "provided";
+const BASE_RUNTIME = "provided.al2";
 const NO_OUTPUT_CAPTURE = { stdio: ["ignore", process.stdout, process.stderr] };
 const MUSL_PLATFORMS = ["darwin", "win32", "linux"];