chore: update 3-networks readme to template (#437)
chore: update 3-networks readme to template (#437)

* fix: update 3-networks readme to template

* Apply suggestions from code review

Co-authored-by: Chris Ingrisani <6b9368f82ebb96253c926b71cb9ef040ed4609ca@users.noreply.github.com>
Co-authored-by: Daniel Andrade <5483594e8df7b6aa208faea2232bc50d3c86aaff@ciandt.com>

Co-authored-by: Chris Ingrisani <6b9368f82ebb96253c926b71cb9ef040ed4609ca@users.noreply.github.com>
Co-authored-by: Daniel Andrade <5483594e8df7b6aa208faea2232bc50d3c86aaff@ciandt.com>
terraform-google-modules/terraform-example-foundation,terraform-google-modules/terraform-example-foundation