fix version in switcher

Author: jcapriot

docs/_static/versions.json

@@ -4,8 +4,8 @@
         "url": "https://discretize.simpeg.xyz/en/main/"
     },
     {
-        "name": "0.11.0 (stable)",
-        "version": "v0.11.0",
+        "name": "0.11.1 (stable)",
+        "version": "v0.11.1",
         "url": "https://discretize.simpeg.xyz/en/v0.11.1/",
         "preferred": true
     },