GitHub URL: Update the GitHub URL Pattern

[gabru-md]

Describe the bug

I am trying to register as a speaker for an event and, I have to add my GitHub URL in my speaker profile. But it shows that the GitHub URL is invalid.

To Reproduce
Steps to reproduce the behaviour:

1. Register as a speaker for an event on eventyay.com

Expected behaviour

Since my profile id https://github.com/gabru-md hence it must validate it.

Screenshots

Additional context

cc: @geekyd @mariobehling

[prateekj117]

@gabru-md Looking into it.

[gabru-md]

sure!

[kushthedude]

@gabru-md please write www as you have done in facebook id , should solve the issue

[gabru-md]

still shows invalid.
If I input https://github.com/gabru then it works.
It fails for https://github.com/gabru-md.

[kushthedude]

@prateekj117 Can I push its PR, As it is a priority:high and you are solving other issues?

[prateekj117]

@kushthedude Go ahead.