Disable automatic Nx version updates during build

[ptr727]

Nx's publishing of information to their releases JSON API is not currently considered reliable enough for hands off automation.

Only the develop branch will use online version information from the CreateMatrix utility at build time.
The main branch still relies on the static Version.json file I manually curate and test, when observing version changes via VisualPing.
I will enable online updates for the main branch when I am confident in the CreateMatrix and releases.json logic.

Examples of problems:

• Nx promoted v5 to stable, then removed v5 and reverted v4 back to stable, this breaks the stable tag logic as Nx does not support downgrades.
• The contents of the releases.json file is not reliable. e.g. on occasion it would contain raw error messages instead of JSON:
  • This XML file does not appear to have any style information associated with it. The document tree is shown below. ...
  • {"resultCode":500,"errorText":"Unexpected error somewhere inside"}