docs: update to account for github changes

Jacky Zhao

2023-03-02 aa5ab03d4ad6e7cb4d9efd3f9c177ebde7e4c4af

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{{if $.Site.Data.config.enableGitHubEdit}}
<a href="{{$.Site.Data.config.GitHubLink}}/{{.File.Path}}" rel="noopener">{{ i18n "edit_source" }}</a>
{{end}}