docs: fix root-dir-only example. (#731)

README.md

@@ -132,7 +132,7 @@ Linter commands work on a subset of all staged files, defined by a _glob pattern
   - **`"*.js"`** will match all JS files, like `/test.js` and `/foo/bar/test.js`
   - **`"!(*test).js"`**. will match all JS files, except those ending in `test.js`, so `foo.js` but not `foo.test.js`
 - If the glob pattern does contain a slash (`/`), it will match for paths as well:
-  - **`"/*.js"`** will match all JS files in the git repo root, so `/test.js` but not `/foo/bar/test.js`
+  - **`"./*.js"`** will match all JS files in the git repo root, so `/test.js` but not `/foo/bar/test.js`
   - **`"foo/**/\*.js"`** will match all JS files inside the`/foo`directory, so`/foo/bar/test.js`but not`/test.js`
 
 When matching, `lint-staged` will do the following