Update the name of pdl.library

Author: Qianqianye

src/data/en.yml

@@ -754,7 +754,7 @@ libraries:
     ml5.js builds on Tensorflow.js and provides friendly access to machine
     learning algorithms and models in the browser.
   numero: A friendly and intuitive math library for p5.js.
-  physics.diagram.lannguage: >-
+  pdl.library: >-
     A set of functions and classes to create interactive diagrams for teaching 
     and learning physics.
   p5.play: >-