Update App.js

Author: Aravindh020

src/App.js

@@ -58,7 +58,7 @@ function App() {
 <GlobalStyles />
 <StyledApp>
 <h1>Data Visualisation Dashboard <button onClick={() => themeToggler()}>Change Theme</button></h1>
- <h4 className="heading">Basic data visualisation dashboard for the given data using a ReactJS  </h4>
+ <h4 className="heading">Basic data visualisation dashboard for the given data using ReactJS </h4>
 <Router>
  <div className="header-right">
  <Link to='/'> Home</Link>