Merge #1127

1127: chore: update Bulb's interview process r=poteto a=aminix

We wanted to have a better description of what our process is. We also updated the url link.

## Add/Update/Remove <CompanyName>

- [x] I have read the [contributing guidelines](https://github.com/poteto/hiring-without-whiteboards/blob/master/CONTRIBUTING.md)
- [x] I agree to the [Code of Conduct](https://github.com/poteto/hiring-without-whiteboards/blob/master/CODE_OF_CONDUCT.md)
- [x] I have followed the [format](https://github.com/poteto/hiring-without-whiteboards/blob/master/CONTRIBUTING.md#format) prescribed in the contributing guidelines
- [x] (OPTIONAL) In your pull request message, add additional context on the interview process if necessary

<!--
Please give additional context about the interview process if necessary.
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Co-authored-by: Amina Layco <amina@bulb.co.uk>

README.md

@@ -154,7 +154,7 @@ Also check out [No Whiteboards](https://nowhiteboards.io) to search for jobs at
 - [Bugcrowd](https://www.bugcrowd.com/about/careers/) | San Francisco, CA / Sydney, NSW | Take home exercise, half-day onsite walking through code, and pair programming.
 - [Buhler Group](http://www.buhlergroup.com) | Prague, CZ | Interview with a couple of technical questions. No task needed. Depending on the team there is another round with the guys in the HQ via skype.
 - [Buildkite](https://buildkite.com/home) | Remote | No CV required. Anonymized writing assessments. Video chat with founder and future team member about you, the job, and the company. Last video chat is a pair programming for technical roles or more in-depth chat for non-technical roles. Offer.
-- [Bulb](https://www.bulb.co.uk) | London, UK | Phone screening, followed by a 2-4 hours take home task. If successful, an interview designing a real-world system with two engineers. Following that, two spoken interview stages: the first more behavioural, then leadership & culture.
+- [Bulb](https://bulb.co.uk/careers/join-the-team/interviewing-for-software-engineers/) | London, UK | Phone screening, followed by a 2-4 hours take home task. If successful, an interview of a real-world problem with two engineers either pairing on a refactoring exercise or designing a system on a whiteboard. Following that, two spoken interview stages: the first one about planning and operational excellence, then leadership & culture.
 - [Busbud](https://www.busbud.com/en/careers) | Montreal, Canada | Phone screening, followed by a 2-4 hours take home assignment. If the challenge is a success, on-site or remote interview with team members, including someone who reviewed it, to talk about it and potential next steps if the challenge was a real life task.
 - [Bustle](https://www.bustle.com/labs) | New York City, Ny / Remote | Half day pair programming on a task for production or one of our Open Source projects. We'll also buy you lunch with the team.
 - [busuu](https://www.busuu.com/jobs) | London, UK | Video call to show real code as first stage. In office pair programming, white board real world problem that we've encountered before, and history/experience discussion.