TBR: Bump up version number for the chrome extension

Change-Id: Ia30b651bafb1ca2ecfd984d479b472898bb7e63f
diff --git a/extension/manifest.json b/extension/manifest.json
index 79db317..dbc9ad2 100644
--- a/extension/manifest.json
+++ b/extension/manifest.json
@@ -1,6 +1,6 @@
 {
   "name": "Vanadium Extension",
-  "version": "0.1.27",
+  "version": "0.1.28",
   "description": "Access and create Vanadium services from JavaScript.",
   "manifest_version": 2,
   "icons": {