fix(middleware-sdk-ec2): add undeclared dependency @aws-sdk/protocol-http (#2043)

Author: blake-transcend

packages/middleware-sdk-ec2/package.json

@@ -23,6 +23,7 @@
     "@aws-sdk/types": "3.4.1",
     "@aws-sdk/util-format-url": "3.4.1",
     "@aws-sdk/util-uri-escape": "3.4.1",
+    "@aws-sdk/protocol-http": "3.5.0",
     "tslib": "^1.8.0"
   },
   "devDependencies": {