update the nav bar (#165)

Author: Revathyvenugopal162

src/ansys_sphinx_theme/static/css/ansys_sphinx_theme.css

@@ -666,8 +666,8 @@ Navigation column (according to side column)
 .col-lg-9 {
   flex: 0 0 80%;
   max-width: 80%;
-  padding-right: 25px;
-  padding-left: 40px;
+  padding-right: 5px;
+  padding-left: 20px;
 }
 
 /*