Potential fix for pull request finding

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

Author: prozolic

src/Markdig/Renderers/TextRendererBase.cs

@@ -320,7 +320,7 @@ public void Write(ReadOnlySpan<char> content)
         {
             WriteIndent();
             WriteRaw(content);
-            if (content[content.Length - 1] == '\n')
+            if (content[content.Length - 1] == '\n' || content[content.Length - 1] == '\r')
             {
                 previousWasLine = true;
             }