redirect shade team page to openstacksdk

Since the shade team is renamed, redirect the old team page location.

Change-Id: I7cc485365ef370ebc724c51557dd2c77b9e8c75e
Signed-off-by: Doug Hellmann <doug@doughellmann.com>

doc/source/conf.py

@@ -62,6 +62,8 @@ htmlhelp_basename = '%sdoc' % project
 git_cmd = "git log --pretty=format:'%ad, commit %h' --date=local -n1"
 html_last_updated_fmt = os.popen(git_cmd).read()
 
+html_extra_path = ['_extra']
+
 # Grouping the document tree into LaTeX files. List of tuples
 # (source start file, target name, title, author, documentclass
 # [howto/manual]).