module: Jira has some docs issues

[FelicianoTech]

Some issues:

• The instructions on the website should mention how to acquire the API key.
• the information for the username paramater says: Your Jira username. {{ undesc }} . Looks like an error?

[ashvin2005]

Hi, I’d like to work on this issue. Could you please assign it to me?

[FelicianoTech]

Sure, thanks!

[ashvin2005]

Hey, I’ve raised the PR, please check it out