Added note

Author: phax

README.md

@@ -3,6 +3,8 @@
 <!-- ph-badge-start -->
 [![Sonatype Central](https://maven-badges.sml.io/sonatype-central/com.helger/ph-css-parent-pom/badge.svg)](https://maven-badges.sml.io/sonatype-central/com.helger/ph-css-parent-pom/)
 [![javadoc](https://javadoc.io/badge2/com.helger/ph-css/javadoc.svg)](https://javadoc.io/doc/com.helger/ph-css)
+
+> If this project saved you some time or made your day a little easier, a star would mean a lot — it helps others find it too.
 <!-- ph-badge-end -->
 
 Java-based CSS 3 parser and builder.
@@ -564,4 +566,4 @@ v3.8.0
 ---
 
 My personal [Coding Styleguide](https://github.com/phax/meta/blob/master/CodingStyleguide.md) |
-It is appreciated if you star the GitHub project if you like it.
+It is appreciated if you star the GitHub project if you like it.