Keep dates and strikethroughs up-to-date

[jonfroehlich]

I noticed the workshop date strikethroughs have not been recently updated. I imagine this is the same for other pages as well. I just fixed it for the workshop page but not for other pages.

Before

After

Someone will need to continuously monitor and keep this stuff up-to-date.

[judykong97]

Just updated for today. I'll keep track of this for future dates.

[jonfroehlich]

Thank you!

[EdigaHe]

@jonfroehlich just updated the general CFP and Student Research Competition pages.