Merge pull request #171 from JuliaMath/ViralBShah-patch-2

Update README.md

Author: ViralBShah

README.md

@@ -3,7 +3,8 @@ Calculus.jl
 
 [![Coverage Status](https://coveralls.io/repos/github/JuliaMath/Calculus.jl/badge.svg?branch=master)](https://coveralls.io/github/JuliaMath/Calculus.jl?branch=master)
 
-Note: This package is currently unmaintained and these capabilities are available in various other Julia packages.
+> [!WARNING]  
+> This package is currently unmaintained and these capabilities are available in various other Julia packages.
 If you would like to help maintain this package (since it is a good teaching tool), please chime in on [#153](https://github.com/JuliaMath/Calculus.jl/issues/153).
 
 # Introduction