Run instructions out of order

[gerrycampion]

I believe the following two lines should be switched:

json-schema-viewer/README.md

Lines 22 to 23 in 8bf0f0a

	1. In one terminal, run `yarn http-serve`
	1. In another terminal, run `yarn build-dev --watch`

In a new build/run, the dist directory has not been created yet, so yarn http-serve will provide the following error and exit:

yarn run v1.22.19
$ http-server-spa dist index.html 8080
[ERR] Could not start server, fallback file not found
[TRY] http-server-spa <directory> <fallback> <port>