Align footer text to center for smaller screens

Thanks for the detailed feedback!  

I’ve replaced the deprecated `-webkit-center` with the standard `center` value and cleaned up the media query formatting for consistency.  

Please take another look.

Signed-off-by: yash khanpara <158573701+khanparaYash@users.noreply.github.com>

Author: khanparaYash

src/css/custom.css

@@ -568,12 +568,12 @@ footer svg {
 
 }
 @media (max-width: 996px) {
-.footer__copyright+div {
-    text-align: -webkit-center;
+  .footer__copyright+div {
+    text-align: center;
   }
 
   .footer__icons.footer {
-    text-align: -webkit-center;
+    text-align: center;
   }
 }