Bug 568974 - Readme file for 4.18

Add entry for Big Sur support

Change-Id: I43cd6072ebc0ef64676aad3b02926cafb9e8b67b
diff --git a/development/readme_eclipse_4.18.html b/development/readme_eclipse_4.18.html
index e60aa54..dc20d51 100644
--- a/development/readme_eclipse_4.18.html
+++ b/development/readme_eclipse_4.18.html
@@ -104,6 +104,7 @@
               </ol></li>
             <li><a href="#mozTocId554478">Platform - SWT</a>
               <ol>
+                <li><a href="#mozTocId565691">Support for macOS 11 (Big Sur)</a></li>
                 <li><a href="#mozTocId534426">Usage of swt.autoScale and GDK_SCALE flag on GTK platforms</a></li>
                 <li><a href="#mozTocId554478">Non-uniform scaling of text vs. icons when using intermediate scaling factors on high-DPI displays</a></li>
                 <li><a href="#mozTocId69222">Eclipse plug-in based on the SWT Browser throws exception</a></li>
@@ -770,6 +771,17 @@
   <h4>
     <a
       class="mozTocH4"
+      name="mozTocId565691">Support for macOS 11 (Big Sur)</a>
+  </h4>
+  <p>
+    <a
+      class="mozTocH4"
+      name="mozTocId565691">Eclipse/SWT 4.18 supports macOS 11 (Big Sur). Most of issues that were identified have been addressed in 4.18. The remaining open issues are tracked by a top level bug for the next release.
+      (bugs </a><a href="https://bugs.eclipse.org/bugs/show_bug.cgi?id=565691">565691</a> and <a href="https://bugs.eclipse.org/bugs/show_bug.cgi?id=569361">569361</a>)
+  </p>
+  <h4>
+    <a
+      class="mozTocH4"
       name="mozTocId534426">Usage of swt.autoScale and GDK_SCALE flag on GTK platforms</a>
   </h4>
   <p>