Fix some case changes to 'mana' component

README.md

@@ -6,4 +6,4 @@ A Collection of Kaplay.js components
 
 ## Components Listing
 
-- Mana, Similar to the built-in [health](https://kaplayjs.com/doc/ctx/health/) component
+- mana, Similar to the built-in [health](https://kaplayjs.com/doc/ctx/health/) component

mana.js

@@ -1,5 +1,5 @@
 /*
-Mana
+mana
 A Magic Component
 Version: 1.0