Merge branch 'feature/7.9.0/DOC-3151' into feature/7.9.0/DOC-3151_TINY-11676

Author: kemister85

modules/ROOT/pages/7.9.0-release-notes.adoc

@@ -57,17 +57,32 @@ The following new Open Source plugin was released alongside {productname} {relea
 
 The following premium plugin updates were released alongside {productname} {release-version}.
 
-// === <Premium plugin name 1>
+=== Accessibility Checker
 
-// The {productname} {release-version} release includes an accompanying release of the **<Premium plugin name 1>** premium plugin.
+The {productname} {release-version} release includes an accompanying release of the **Accessibility Checker** premium plugin.
 
-// **<Premium plugin name 1>** <Premium plugin name 1 version> includes the following <fixes, changes, improvements>.
+**Accessibility Checker** includes the following fixes and improvements.
 
-// ==== <Premium plugin name 1 change 1>
+==== Adjusted spacing in accessibility checker component for better visual alignment
+// #TINY-11757
+Previously in {productname}, the error card for the Accessibility Checker had slightly more space between content than necessary, making the dialog appear less compact.
 
-// // CCFR here.
+With the release {productname} {release-version}, the design has been updated to reduce the padding within the error card, ensuring a more compact and cohesive design.
 
-// For information on the **<Premium plugin name 1>** plugin, see: xref:<plugincode>.adoc[<Premium plugin name 1>].
+For information on the **Accessibility Checker** plugin, see: xref:a11ychecker.adoc[Accessibility Checker].
+
+=== Spell Checker
+
+The {productname} {release-version} includes an accompanying release of the **Spell Checker** premium plugin.
+
+**Spell Checker** includes the following improvement.
+
+==== Spellchecking with a language that does not match the content no longer overloads the spelling server.
+// #TINY-12061
+
+Previously, using the spellchecker with a language that did not match the document content could cause server overload due to the large volume of unrecognized words. This issue led to excessive CPU usage on the spelling server. In {release-version}, {productname} now processes words in manageable chunks, reducing the load on the server and preventing performance degradation during spellchecking operations with mismatched language settings.
+
+For information on the **Spell Checker** premium plugin, see: xref:introduction-to-tiny-spellchecker.adoc[Spell Checker plugin].
 
 
 [[accompanying-premium-plugin-end-of-life-announcement]]
@@ -160,6 +175,11 @@ Previously, when pressing `Enter` before a floating image, the image could be du
 
 With the release of {productname} {release-version}, an internal new line mechanism has been introduced to replace the unreliable browser behavior. This ensures consistent and correct handling of new lines around floating content. Pressing `Enter` before a floating image now behaves as expected, and duplicate images no longer appear.
 
+=== Removed deprecated CSS media selector `-ms-high-contrast`.
+// TINY-11876
+
+The `-ms-high-contrast` media feature was previously used to apply a darker border color for improved accessibility in Internet Explorer 11. However, this feature is no longer supported and has been link:https://blogs.windows.com/msedgedev/2024/04/29/deprecating-ms-high-contrast/[officially deprecated] by Microsoft Edge. Its continued use triggered warnings in browser developer consoles, potentially affecting user experience during development. To enhance cross-browser compatibility and eliminate these warnings, the deprecated selector has been removed from {productname} in {release-version}.
+
 
 [[security-fixes]]
 == Security fixes