Update README.md

small grammar fix, parallel construction

Author: tphinney

README.md

@@ -2,7 +2,7 @@
 
 These are two different official icon sets from Google, using the same underlying designs. Material Icons is the classic set, while Material Symbols was introduced in April 2022, built on variable font technology.
 
-The icons can be browsed in a more user-friendly way at https://fonts.google.com/icons. Use the popdown menu near top left to choose between the two sets, Material Symbols is the default.
+The icons can be browsed in a more user-friendly way at https://fonts.google.com/icons. Use the popdown menu near top left to choose between the two sets; Material Symbols is the default.
 
 The icons are designed under the [material design guidelines](https://material.io/guidelines/).
 
@@ -73,7 +73,7 @@ What is currently _not_ available in Material Icons?
 
 ## Material Symbols
 
-These newer icons can be browsed in a more user-friendly way at https://fonts.google.com/icons. (Use the popdown menu near top left to choose between the two sets, Material Symbols is the default).
+These newer icons can be browsed in a more user-friendly way at https://fonts.google.com/icons. Use the popdown menu near top left to choose between the two sets; Material Symbols is the default.
 
 These icons were built/designed as variable fonts first (based on the 24 px designs from Material Icons). There are three separate Material Symbols variable fonts, which also have static icons available (but those do not have all the variations available, as that would be hundreds of styles):
 - Outlined