clarify CDN initialization for Inline JS v2

Author: gloriadasilva

dist/doc/developer-tools/inlinejs/initialize.js

@@ -1,4 +1,7 @@
-const js = `// Add for NPM, Yarn
+const js = `// Add for CDN
+const Paystack= new PaystackPop();
+
+// Add for NPM, Yarn
 import Paystack from '@paystack/inline-js';
 
 const popup = new Paystack()`

src/doc/developer-tools/inlinejs/initialize/index.js

@@ -1,4 +1,10 @@
+// Add for CDN
+const popup= new PaystackPop();
+
 // Add for NPM, Yarn
 import Paystack from '@paystack/inline-js';
 
-const popup = new Paystack()
+const popup = new Paystack()
+
+// Note: The CDN build exposes `PaystackPop` globally, 
+// whereas the npm package exports `Paystack`.