Update README.md

[ouiliame]

Summary of changes

Changed network details and Go version required for building

Report of required housekeeping

• Github issue OR spec proposal link
• Wrote tests
• Updated API documentation (client/lcd/swagger-ui/swagger.yaml)
• Added a relevant changelog entry: clog add [section] [stanza] [message]

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(FOR ADMIN) Before merging

• Added appropriate labels to PR
• Squashed all commits, uses message "Merge pull request #XYZ: [title]" (coding standards)
• Confirm added tests are consistent with the intended behavior of changes
• Ensure all tests pass

[codecov]

Codecov Report

Merging #412 into develop will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff            @@
##           develop     #412   +/-   ##
========================================
  Coverage    67.70%   67.70%           
========================================
  Files          117      117           
  Lines         5038     5038           
========================================
  Hits          3411     3411           
  Misses        1415     1415           
  Partials       212      212