[librsvg] Fix links to code_of_conduct.md

[Federico Mena Quintero <federico src gnome org>]

commit 027cc7d98d833cb6fb14534c17e890c0275b6f29
Author: Federico Mena Quintero <federico gnome org>
Date:   Thu Nov 30 13:40:37 2017 -0600

    Fix links to code_of_conduct.md

 README.md |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/README.md b/README.md
index 09dff87..ed46537 100644
--- a/README.md
+++ b/README.md
@@ -89,7 +89,7 @@ can [mail me][mail] for any other questions you have about librsvg.
 [svg]: https://en.wikipedia.org/wiki/Scalable_Vector_Graphics
 [gnome]: https://www.gnome.org/
 [cairo]: https://www.cairographics.org/
-[coc]: code-of-conduct.md
+[coc]: code_of_conduct.md
 [autotools]: https://autotools.io/index.html
 [compiling]: COMPILING.md
 [docs]: https://developer.gnome.org/rsvg/stable/