Possible tweaks to the slack action

[bitdivine]

Thank you for showing how to make notifications with the slack action.

There are two small chnages that you might find interesting:

• There is a typo in the description. send -> sends
• There is a github actions variable for the repository name. If you use that, the action can be used in other projects without change. See, GITHUB_REPOSITORY as defined here: https://docs.github.com/en/actions/learn-github-actions/variables This of course has no benefit for internet identity itself, indeed it adds risk if GitHub changes the variable, but your fans would appreciate it.

$ diff action.yml  ~/dfn/internet-identity/.github/actions/slack/action.yml 
2c2
< description: 'A simple action that sends a slack message to a channel.'
---
> description: 'A simple action that send a slack message to a channel.'
14c14
<         echo '{}' | jq --arg text "$MESSAGE: https://github.com/$GITHUB_REPOSITORY/actions/runs/$GITHUB_RUN_ID" '.text = $text' | \
---
>         echo '{}' | jq --arg text "$MESSAGE: https://github.com/dfinity/internet-identity/actions/runs/$GITHUB_RUN_ID" '.text = $text' | \