DOC-2270: add entry to `release notes` mentioning removal of open source Template plugin from TinyMCE 7.0 (#3157)

* DOC-2270: add entry for removal of open source Template plugin from TinyMCE 7.0.

* Update modules/ROOT/pages/7.0-release-notes.adoc

Co-authored-by: shanmen-tiny <shanmen.ng@tiny.cloud>

* Update modules/ROOT/pages/7.0-release-notes.adoc

Co-authored-by: ltrouton <46954949+ltrouton@users.noreply.github.com>

* Update modules/ROOT/pages/7.0-release-notes.adoc

Co-authored-by: ltrouton <46954949+ltrouton@users.noreply.github.com>

* Update modules/ROOT/pages/7.0-release-notes.adoc

---------

Co-authored-by: shanmen-tiny <shanmen.ng@tiny.cloud>
Co-authored-by: ltrouton <46954949+ltrouton@users.noreply.github.com>

modules/ROOT/pages/7.0-release-notes.adoc

@@ -519,6 +519,15 @@ NOTE: The new `trigger` option can handle multiple character strings as the trig
 
 For more information, visit the updated xref:autocompleter.adoc[Autocompleter] documentation.
 
+=== The open-source `template` plugin has been removed.
+// #TINY-10654
+
+The open-source `template` plugin and associated config options have been removed in {productname} 7.0.
+
+Customers using the `template` plugin will need to migrate to the premium xref:advanced-templates.adoc['advtemplate'] plugin in {productname} 7.0, which contains all the functionality except some esoteric options.
+
+For more information, see xref:migration-from-6x.adoc#deprecated-plugins-template-plugin[Migrating from {productname} 6 to {productname} 7].
+
 [[bug-fixes]]
 == Bug fixes