Update links in README

Change the outdated links to the latest links in README

Change-Id: Id6fbf137d016febb37bdf5560569241a585138d4

README.rst

@@ -2,8 +2,8 @@
 Team and repository tags
 ========================
 
-.. image:: http://governance.openstack.org/badges/i18n.svg
-    :target: http://governance.openstack.org/reference/tags/index.html
+.. image:: https://governance.openstack.org/tc/badges/i18n.svg
+    :target: https://governance.openstack.org/tc/reference/tags/index.html
 
 .. Change things from this point on