[gnome-builder] README: update IRC link

[Christian Hergert <chergert src gnome org>]

commit 03e8a19fefe2344ac5b31551322663126d3ad0c4
Author: Christian Hergert <chergert redhat com>
Date:   Thu Sep 21 01:56:12 2017 -0700

    README: update IRC link

 README.md |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
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diff --git a/README.md b/README.md
index bed5eb8..de06b93 100644
--- a/README.md
+++ b/README.md
@@ -9,7 +9,7 @@ Develop software for GNOME
  * [Download a Release Tarball](https://download.gnome.org/sources/gnome-builder/)
  * [Browse source code in Git version control](https://git.gnome.org/browse/gnome-builder)
  * [Learn more about Builder](https://wiki.gnome.org/Apps/Builder)
- * [Chat with the developers](irc://irc.gnome.org/#gnome-builder)
+ * [Chat with the developers](irc://irc.gnome.org/#gnome-builder) in #gnome-builder on irc.gnome.org
 
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