docs: Add eslint-config-prettier to devDependencies in custom-hooks example (#1127)

* Add eslint-config-prettier to devDependencies in custom-hooks example

* Remove unnecessary run from start command

Author: cseas

examples/custom-hooks/README.md

@@ -3,4 +3,4 @@
 To run this example:
 
 - `npm install` or `yarn`
-- `npm run start` or `yarn start`
+- `npm start` or `yarn start`

examples/custom-hooks/package.json

@@ -20,7 +20,8 @@
     "@rescripts/cli": "^0.0.11",
     "@rescripts/rescript-use-babel-config": "^0.0.8",
     "@rescripts/rescript-use-eslint-config": "^0.0.9",
-    "babel-eslint": "10.0.1"
+    "babel-eslint": "10.0.1",
+    "eslint-config-prettier": "^6.12.0"
   },
   "browserslist": {
     "production": [