git.html: fix cgit link

There's an issue with the cgit installation, which causes
git.buildroot.net/buildroot (no trailing /) requests to return stale
results. The osuosl people are looking into it, but until then atleast
use the the correct URL on the website link.

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

docs/git.html

@@ -4,7 +4,7 @@
 <h3>Git Access</h3>
 
 The buildroot repository can be browsed online through cgit at
-<a href="http://git.buildroot.net/buildroot">http://git.buildroot.net/buildroot</a>.
+<a href="http://git.buildroot.net/buildroot/">http://git.buildroot.net/buildroot</a>.
 To grab a copy of the repository use
 
 <pre>