[Glitch] Ensure tabIndex is number instead of string

Port ec0c104bf2 to glitch-soc

Signed-off-by: Claire <claire.github-309c@sitedethib.com>

app/javascript/flavours/glitch/features/compose/components/search.jsx

@@ -147,7 +147,7 @@ class Search extends React.PureComponent {
           onBlur={this.handleBlur}
         />
 
-        <div role='button' tabIndex='0' className='search__icon' onClick={this.handleClear}>
+        <div role='button' tabIndex={0} className='search__icon' onClick={this.handleClear}>
           <Icon id='search' className={hasValue ? '' : 'active'} />
           <Icon id='times-circle' className={hasValue ? 'active' : ''} />
         </div>