DOC-3147: Update migration guide to clarify license key manager directory and initialization steps.

Author: kemister85

modules/ROOT/pages/migration-from-7x.adoc

@@ -93,7 +93,7 @@ tinymce.init({
 When migrating to TinyMCE {release-version} with a commercial license, the license key manager addon is required for the editor to operate. The setup varies based on your deployment method:
 
 . *CDN/Static Hosting:*
-** Ensure the supplied `licensekeymanager` folder is in your TinyMCE plugins directory:
+** Ensure the supplied `licensekeymanager` folder is in your {productname} plugins directory:
 +
 [tree]
 ----
@@ -143,7 +143,7 @@ export default function MyEditor() {
 ----
 
 . *PHP/Laravel:*
-** Ensure the license key manager is included when publishing TinyMCE assets:
+** Ensure the license key manager is included when publishing {productname} assets:
 +
 [source, php]
 ----
@@ -161,7 +161,7 @@ tinymce.init({
 ====
 * The license key manager is automatically included when using Tiny Cloud.
 * The plugin does not need to be added to the `plugins` configuration option.
-* For bundled applications, the license key manager must be loaded before TinyMCE initialization.
+* For bundled applications, the license key manager must be loaded before {productname} initialization.
 * For bundled applications, ensure the license key manager is not excluded during build optimization.
 ====
 
@@ -403,15 +403,13 @@ When upgrading to {productname} 8, you will need to review and possibly update h
 [source, javascript]
 ----
 tinymce.init({
-  selector: 'textarea',
-  crossorigin: (url, resourceType) => {
-    // Add crossorigin="anonymous" for cross-origin resources
-    if (url.startsWith('https://your-cdn.com')) {
-      return 'anonymous';
-    }
-    // Omit crossorigin attribute for same-origin resources
-    return '';
-  }
+  selector: "textarea",
+	crossorigin: (url, resourceType) => {
+  // Returning 'anonymous' or 'use-credentials' here would explicitly set the attribute
+	// return 'anonymous';
+	// return 'use-credentials';
+	return undefined; // Omit the 'crossorigin' attribute for all resources by returning undefined
+  },
 });
 ----
 +