update JQuery to prevent CORS issue

[gklandes]

'elo Cloud Gurus! I hit a snag in the serverless workshop with CORS blocking me in Lab 2. The issue is with the x-requested-with header field; here is the CORS error from the console:

CORS policy: Request header field x-requested-with is not allowed by Access-Control-Allow-Headers in preflight response.

I found this discussed here:

https://acloud.guru/forums/serverless-for-beginners/discussion/-L_lzhGqtheBLRwD-fd8/request_header_field_x-request

There was a solid work-around that could be added to the video, but a simpler solution (seems to me) was to update JQuery. Newer library doesn't send that header field.