Update Readme (#14176)

Replace core with react, dom-client with react-dom

scripts/bench/README.md

@@ -5,7 +5,7 @@
 In most cases, the only two commands you might want to use are:
 
 - `yarn start`
-- `yarn --cwd=../../ build core,dom-client --type=UMD_PROD && yarn start --skip-build`
+- `yarn --cwd=../../ build react/index,react-dom/index --type=UMD_PROD && yarn start --skip-build`
 
 The first command will run benchmarks with all the default settings. A local and remote build will occur on React and ReactDOM UMD bundles, both local and remote repos will be run against all benchmarks.
 

scripts/bench/build.js

@@ -104,7 +104,7 @@ async function buildBenchmarkBundlesFromGitRepo(
 async function buildReactBundles(reactPath = getDefaultReactPath(), skipBuild) {
   if (!skipBuild) {
     await executeCommand(
-      `cd ${reactPath} && yarn && yarn build core,dom-client --type=UMD_PROD`
+      `cd ${reactPath} && yarn && yarn build react/index,react-dom/index --type=UMD_PROD`
     );
   }
 }