fix slither tooltip background

libs/remix-ui/static-analyser/src/lib/remix-ui-static-analyser.tsx

@@ -490,7 +490,7 @@ export const RemixUiStaticAnalyser = (props: RemixUiStaticAnalyserProps) => {
             <a className="mt-1 text-nowrap" href='https://remix-ide.readthedocs.io/en/latest/slither.html#enable-slither-analysis' target={'_blank'}>
               <OverlayTrigger placement={'right'} overlay={
                 <Tooltip className="text-nowrap" id="overlay-tooltip">
-                  <span className="p-1 pr-3" style={{ backgroundColor: 'black', minWidth: '230px' }}>Learn how to use Slither Analysis</span>
+                  <span className="p-1 pr-3" style={{minWidth: '230px' }}>Learn how to use Slither Analysis</span>
                 </Tooltip>
               }>
                 <i style={{ fontSize: 'medium' }} className={'fal fa-info-circle ml-3'} aria-hidden="true"></i>