version.json: correct our maint branch names

Author: ethomson

version.json

@@ -2,8 +2,8 @@
   "$schema": "https://raw.githubusercontent.com/AArnott/Nerdbank.GitVersioning/master/src/NerdBank.GitVersioning/version.schema.json",
   "version": "0.26.0-preview.{height}",
   "publicReleaseRefSpec": [
-    "^refs/heads/master$", // we release out of master
-    "^refs/heads/v\\d+(?:\\.\\d+)?$" // we also release out of vNN branches
+    "^refs/heads/master$",                  // we release out of master
+    "^refs/heads/maint/v\\d+(?:\\.\\d+)?$"  // and maint/vNN branches
   ],
   "cloudBuild": {
     "buildNumber": {