Update docs.airshipit.org functional test

The string previously expected in the docs.airshipit.org site is no
longer used there, so pick another which will get the
system-config-run-static job passing again.

Change-Id: I8bf0da25408412dc80ff8cb6d26c185234916941

testinfra/test_static.py

@@ -46,7 +46,7 @@ def test_docs_airshipit_org(host):
     cmd = host.run('curl --insecure '
                    '--resolve docs.airshipit.org:443:127.0.0.1 '
                    'https://docs.airshipit.org/')
-    assert 'Airship Treasuremap' in cmd.stdout
+    assert 'Airship documentation' in cmd.stdout
 
 def test_governance_openstack_org(host):
     cmd = host.run('curl --insecure '