the template.rb file used in README is not pointing to the correct branch

[pengyin-shan]

Hi, I'm a new develper and I tried to create a spotlight app using the tutorial in README.md. I noticed that since the default branch is main instead of master, we need to add a branch name to template.rb, otherwise we will get an error from git in the creation process.

i.e.:
gem 'blacklight-spotlight', ENV['SPOTLIGHT_GEM'] ? { path: ENV['SPOTLIGHT_GEM'] } : { github: 'projectblacklight', branch: 'main'}