Fixed a GitHub Markdown parse error

Author: steindani

README.md

@@ -10,13 +10,13 @@ The Code Blocks like the following will include every file in a new line. The
 reference paths should be either absolute or relative to the folder where the
 pandoc command will be executed.
 
-`````
-```include
-/absolute/file/path.md
-relative/to/the/command/root.md
-#do/not/include/this.md
+```markdown
+```include
+/absolute/file/path.md
+relative/to/the/command/root.md
+#do/not/include/this.md
+```
 ```
-`````
 
 If the file does not exist, it will be skipped completely. No warnings, no
 residue, nothing. Putting an `#` as the first character in the line will make the