Fix grammatical error in about.js

Author: AritraDey-Dev

src/pages/about.js

@@ -35,7 +35,8 @@ function Hello() {
               </div>
               <div class="card__body">
                 <p>
-                  Because no one measurement provides a complete picture,
+                  Because no one measurement provide
+                    a complete picture,
                   multiple data sources must be integrated in a sensible manner.
                   Process-based models represent an ideal framework for
                   integrating these data streams because they represent multiple