get started: Remove 'enable istio' (now in community repos) (fixes #634)

[thp-canonical]

Done

Remove microk8s enable istio from the instructions, because it depends on community repositories

QA

• Check out this feature branch
• Run the site using the command ./run serve
• View the site locally in your web browser at: http://0.0.0.0:8027/
• Run through the following QA steps
• The microk8s enable istio item in step 3. of the getting started guide has been removed for Linux, macOS and Windows

Issue / Card

Fixes #634

[webteam-app]

Demo starting at https://microk8s-io-635.demos.haus

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 83.78%. Comparing base (b9ee7b2) to head (2bad8a0).
Report is 18 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #635   +/-   ##
=======================================
  Coverage   83.78%   83.78%           
=======================================
  Files           2        2           
  Lines          74       74           
=======================================
  Hits           62       62           
  Misses         12       12           

Flag	Coverage Δ
python	83.78% <ø> (ø)

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[divineforge]

I think this is a value change to the documentation. worth merging it, otherwise creating some 'unhelpful situation' to beginners