Update data #17 solved

[MercureTony]

1. The merge conflict has been solved;
2. Improvement commentaries on the issue #17 have also been applied, except the conversion of column 5 and column 12 (need more specification on what to do);
3. Name links for the markdown file have been updated.

[Zackhardtoname]

1. Thank you! Would you be able to replace the full names of the states (in the U.S.) with their abbreviations?
2. The info in the Notes column for Atlassian and Databricks both should be in the Class Year column.
3. Sorry if #10 was not clear, what is needed is some code that gives the company names links like on the website. Since we update the data frequently, we have to do it programmatically, hence my comments in #10, wouldn't you agree?

I think you truly great work there! Since 3. above would probably take more time, I think it's fine if we merge the pull request after you do 1. and 2. Thank you so much!

[MercureTony]

• [x] 1. States name replace by their abbreviation;
• [x] 2. Note column has been corrected for Atlassian and Databricks into Class Year

[Zackhardtoname]

Hi MercureTony, In your last commit, the state names are back in full again.