Fixes typo in .editorconfig

Corrects a typo in the .editorconfig file, changing ".slnx}" to "slnx}".
This ensures correct application of code style settings for Visual Studio solution files.

Author: edumserrano

MarkdownLinkCheckLogParser/.editorconfig

@@ -26,7 +26,7 @@ trim_trailing_whitespace = true
 ##########################################
 
 # Visual Studio Solution Files
-[*.{sln,.slnx}]
+[*.{sln,slnx}]
 indent_style = tab
 
 # Visual Studio XML Project Files