[osf] redirect old nav URL to new website for jobs page

[nkmeyers]

another orphaned nav URL - new site doesn't redirect old URL for jobs page

I noticed this on flow dock from Andrew re the jobs link he wrote:

Should we have any redirects from the old site to the new? For example, I had this page open for yesterday’s interview, but today the link no longer worked. It could be relevant because we presumably include it in job postings, fliers, etc: https://cos.io/jobs/ (now: https://cos.io/our-communities/jobs/)

[ajski]

Checked redirect, appears to be working now