Add ApiInfo Rate limiting description to Getting Started (#1524)
Add ApiInfo Rate limiting description to Getting Started (#1524)

* Draft section on ApiInfo in getting started

* typo: to --> do

* Add link to github api

* Add note on authenticated client limits

* wording tweak

* Point to better API doc link

* change variable init in code sample

shiftkey-tester/octokit.net,alfhenrik/octokit.net,gdziadkiewicz/octokit.net,rlugojr/octokit.net,TattsGroup/octokit.net,gdziadkiewicz/octokit.net,khellang/octokit.net,octokit/octokit.net,thedillonb/octokit.net,shiftkey/octokit.net,M-Zuber/octokit.net,shiftkey-tester/octokit.net,eriawan/octokit.net,editor-tools/octokit.net,eriawan/octokit.net,ivandrofly/octokit.net,rlugojr/octokit.net,thedillonb/octokit.net,alfhenrik/octokit.net,octokit/octokit.net,editor-tools/octokit.net,TattsGroup/octokit.net,adamralph/octokit.net,khellang/octokit.net,M-Zuber/octokit.net,ivandrofly/octokit.net,shiftkey/octokit.net