Update docs/rules/checked-requires-onchange-or-readonly.md

Co-authored-by: Jordan Harband <[email protected]>

Author: jaesoekjjang

docs/rules/checked-requires-onchange-or-readonly.md

@@ -23,10 +23,10 @@ React.createElement('input', { type: 'checkbox', checked: true, defaultChecked:
 Example of **correct** code for this rule:
 
 ```jsx
-<input type='checkbox' checked onChange={() => {}}/>
-<input type='checkbox' checked readOnly/>
-<input type='checkbox' checked onChange readOnly/>
-<input type='checkbox' defaultChecked/>
+<input type="checkbox" checked onChange={() => {}} />
+<input type="checkbox" checked readOnly />
+<input type="checkbox" checked onChange readOnly />
+<input type="checkbox" defaultChecked />
 
 React.createElement('input', {type: 'checkbox', checked: true, onChange: () => {}})
 React.createElement('input', {type: 'checkbox', checked: true, readOnly: true})