chore (chromium): bump stable channel version to 68.0.3440.106

Author: botsimo

packages/lambda/builds/chromium/version.json

@@ -1,5 +1,5 @@
 {
   "beta": "69.0.3497.32",
   "dev": "70.0.3514.0",
-  "stable": "68.0.3440.84"
+  "stable": "68.0.3440.106"
 }