DOC-3234: update TinyMCE ref with global var.

Author: kemister85

modules/ROOT/pages/migration-guides.adoc

@@ -1,4 +1,4 @@
-= TinyMCE Migration Guides
+= {productname} Migration Guides
 :description: Comprehensive guides for upgrading between TinyMCE versions (4.x, 5.x, 6.x) and migrating from other rich text editors
 :keywords: migration, upgrade, version, tinymce 4, tinymce 5, tinymce 6, froala
 :title_nav: Migration Guides
@@ -13,27 +13,27 @@
 
 a|
 [.lead]
-xref:migration-from-6x.adoc[Migrating from TinyMCE 6]
+xref:migration-from-6x.adoc[Migrating from {productname} 6]
 
-Guide for upgrading from TinyMCE 6 to TinyMCE 7, covering configuration changes and UI component updates.
+Guide for upgrading from {productname} 6 to {productname} 7, covering configuration changes and UI component updates.
 
 a|
 [.lead]
-xref:migration-from-5x.adoc[Migrating from TinyMCE 5]
+xref:migration-from-5x.adoc[Migrating from {productname} 5]
 
-Guide for upgrading from TinyMCE 5 to TinyMCE 7, including architectural improvements and security updates.
+Guide for upgrading from {productname} 5 to {productname} 7, including architectural improvements and security updates.
 
 a|
 [.lead]
-xref:migration-from-4x.adoc[Migrating from TinyMCE 4]
+xref:migration-from-4x.adoc[Migrating from {productname} 4]
 
-Guide for upgrading from TinyMCE 4 to TinyMCE 7, detailing major architectural changes and modern UI improvements.
+Guide for upgrading from {productname} 4 to {productname} 7, detailing major architectural changes and modern UI improvements.
 
 a|
 [.lead]
 xref:migration-from-froala.adoc[Migrating from Froala]
 
-Guide for migrating from Froala Editor to TinyMCE, with equivalent feature mappings and configuration guidance.
+Guide for migrating from Froala Editor to {productname}, with equivalent feature mappings and configuration guidance.
 
 // Empty cell to even out rows
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