Many Hackforla references changed into generic opensource project. #4
Description
Issue Description: Upstream is deleting Hackforla references.
Below list many changes upstream has made.
Removed first reference from the main page
Change from hackforla to a generic opensource
https://github.com/hackforla/intro-cli-git-github/pull/3/files#diff-68d31311b79ceb5c0dce61e8d079a906
These references are name changes for temporary files during exercises.
https://github.com/hackforla/intro-cli-git-github/pull/3/files#diff-9404b069e7e7575d593ec4fcbf76ae24
The only hackforla reference left over.
https://github.com/ndanielsen/intro-cli-git-github/blame/master/materials/1-Intro-Command-Line.md#L62