Avivash/readme change beta to alpha

[avivash]

Description

Updating beta in the readme to say alpha, as that's what we're referring to it as in the new webnative.dev designs:

Link to issue

https://discord.com/channels/478735028319158273/560980601155616802/1037067486362869810

Type of change

• [x] Bug fix (non-breaking change that fixes an issue)
• [x] This change requires a documentation update

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Name	Status	Preview	Updated
webnative-template	✅ Ready (Inspect)	Visit Preview	Nov 1, 2022 at 9:05PM (UTC)