Fix broken UK RSE survey links

[crd477]

Description

Fix some broken UK RSE survey links that are causing urlcheck failures.

Checklist:

• I have previewed changes locally or with CircleCI (runs when PR is created)
• I have completed any content reviews, such as getting input from relevant working groups. If no, please note this and wait to post the PR to the #website channel until the content has been settled.

When you are ready for a technical review/merge, post the for the link for the PR in the US-RSE Slack (#website) to ask for reviewers.

[crd477]

Previews: https://output.circle-artifacts.com/output/job/fc3d46ec-329a-4fd0-92b8-a5e8fa344759/artifacts/0/usrse.github.io/2021-11-22-rse-survey/index.html and https://output.circle-artifacts.com/output/job/fc3d46ec-329a-4fd0-92b8-a5e8fa344759/artifacts/0/usrse.github.io/2022-02-06-a-brief-history-of-usrse/index.html

[crd477]

I propose to punt on the failing blackistechconference.com for now.

[danielskatz]

For the survey, can we say that it ended, and point to the results: https://github.com/softwaresaved/international-survey-2022

[crd477]

I included a link to the rendered version of the results instead of the corresponding repo. Let me know if that works for you.

[crd477]

Updated preview.
I did not change the other file since the offending URL in that case was part of a quoted email message; I simply left it unlinked.

[danielskatz]

Thanks @crd477!