run our docs job using 1.1.0 (#3687)

diff --git a/Jenkinsfile b/Jenkinsfile
index 36cc009..18091c7 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -70,7 +70,7 @@
     ],
     [
         label: 'docker',
-        imageName: 'pyca/cryptography-runner-ubuntu-rolling',
+        imageName: 'pyca/cryptography-runner-sid',
         toxenvs: ['docs'],
         artifacts: 'cryptography/docs/_build/html/**',
         artifactExcludes: '**/*.doctree',
@@ -87,7 +87,7 @@
     configs.add(
         [
             label: 'docker',
-            imageName: 'pyca/cryptography-runner-ubuntu-rolling',
+            imageName: 'pyca/cryptography-runner-sid',
             toxenvs: ['docs-linkcheck'],
         ]
     )