chore(aws-echo-service): update @aws-crypto/* deps

Author: trivikr

private/aws-echo-service/package.json

@@ -19,8 +19,8 @@
   "module": "./dist-es/index.js",
   "sideEffects": false,
   "dependencies": {
-    "@aws-crypto/sha256-browser": "^1.1.0",
-    "@aws-crypto/sha256-js": "^1.1.0",
+    "@aws-crypto/sha256-browser": "2.0.0",
+    "@aws-crypto/sha256-js": "2.0.0",
     "@aws-sdk/config-resolver": "3.38.0",
     "@aws-sdk/fetch-http-handler": "3.38.0",
     "@aws-sdk/hash-node": "3.38.0",