Update branch name in version.json

Changed the branch reference from 'main' to 'master' in the version.json file. This adjustment ensures correct versioning and release processes for branches tagged under 'master'.

Author: Magnus Ahlberg

version.json

@@ -2,7 +2,7 @@
   "$schema": "https://raw.githubusercontent.com/dotnet/Nerdbank.GitVersioning/main/src/NerdBank.GitVersioning/version.schema.json",
   "version": "0.14-beta",
   "publicReleaseRefSpec": [
-    "^refs/heads/main$",
+    "^refs/heads/master$",
     "^refs/heads/release/v\\d+(?:\\.\\d+)?$"
   ],
   "cloudBuild": {