Update appcast.xml

Author: sbarex

appcast.xml

@@ -6,14 +6,18 @@
             <title>2.1.8</title>
             <pubDate>sab, 12 feb 2022 12:18:00 +0100</pubDate>
             <sparkle:minimumSystemVersion>10.15</sparkle:minimumSystemVersion>
-            <enclosure type="application/octet-stream" url="https://github.com/sbarex/SourceCodeSyntaxHighlight/releases/download/2.1.8/Syntax.Highlight.zip" sparkle:shortVersionString="2.1.8" sparkle:version="55" sparkle:edSignature="Z+MQ2qtLIMolkVIgHtqY687mdjXhlecLyiL+jT6iNgTgk2dLNRVOPrmxRQ6si/g8v/52cSkdeHPx1zubokY0Ag==" length="12526094" />
+            <enclosure type="application/octet-stream" url="https://github.com/sbarex/SourceCodeSyntaxHighlight/releases/download/2.1.8/Syntax.Highlight.zip" sparkle:shortVersionString="2.1.8" sparkle:version="56" sparkle:edSignature="rJjhFUtipPXwhT6AlP4FDuAXTaaS1heTbYsF/t/vMQvFwyDS1CBd88du0eysMCHPvgNzfXQgZ6aSR4h6L3n+AQ==" length="10618471" />
             <description><![CDATA[
-                <h2>Release 2.1.8 (55)</h2>
+                <h2>Release 2.1.8 (56)</h2>
                 <p>New features:</p>
                 <ul>
                     <li>Better support Gdscript files (Godot engine) (<code>.gd</code>).</li>
                     <li>Highlight updated to version 4.2.</li>
                 </ul>
+                <p>Bug fix:</p>
+                <ul>
+                    <li>Regression fix for rft background color.</li>
+                </ul>
                 <p><b>If you use the release 2.1.6, the automatic update does not work. Tou have to <a href="https://github.com/sbarex/SourceCodeSyntaxHighlight/releases/download/2.1.8/Syntax.Highlight.zip">manually download the application from the web</a>.</b></p>
                 <ol>
                     <li>Unzip the archive</li>
@@ -28,7 +32,7 @@
 
         <item>
             <title>2.1.7</title>
-            <pubDate>ven, 11 feb 2022 18:35:00 +0100</pubDate>
+            <pubDate>mar, 15 feb 2022 8:14:00 +0100</pubDate>
             <sparkle:minimumSystemVersion>10.15</sparkle:minimumSystemVersion>
             <enclosure type="application/octet-stream" url="https://github.com/sbarex/SourceCodeSyntaxHighlight/releases/download/2.1.7/Syntax.Highlight.zip" sparkle:shortVersionString="2.1.7" sparkle:version="54" sparkle:edSignature="KjgtrLI7DRq3VeG4AhMEw+wIOZK+xyZ62xCWSrpm1XrcJqDkE/UtQ/kHbHcJjWdjtzA5Y4hzb2thHQELcVADCQ==" length="11412497" />
             <description><![CDATA[