Handbook: Versioning page is out of date

[hardillb]

Current Behavior

The Visioning page https://flowfuse.com/handbook/product/versioning/

States that current version is 1.x and that 2.0 is in development.

2.x.y became the current version with the name change.

Also Device agent is now on 3.x

Expected Behavior

Page should reflect current numbering.

Steps To Reproduce

Read page

Environment

• Date:
• Platform/OS:
• Browser:

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