Update Documentation/GeneralConventions/ReadmeFile.rst

Co-authored-by: Chris Müller <2566282+brotkrueml@users.noreply.github.com>

Documentation/GeneralConventions/ReadmeFile.rst

@@ -7,7 +7,7 @@
 :file:`README.rst` or :file:`README.md`
 =======================================
 
-Full documentation contains both a README.rst and a Documentation/Index.rst
+Full documentation contains both a :file:`README.rst` and a :file:`Documentation/Index.rst`
 file. To avoid redundancy in both places, the README.rst in this case usually
 contains only a summary and links to all aspects of the project, i.e. the VCS
 repository, the published documentation and - if available - the TYPO3 Extension