Fix broken links on logos

[WebSnke]

URL of the page: https://loopback.io/

Some of the links are broken and result in an error when trying to click on them.
I marked the respective logos in this screenshot:

[WebSnke]

@dhmlau
Do you want me to remove them?
I checked whether they are still unavailable and every website I mentioned still is.

[GrooveCS]

I checked the links on the landing page today and found the following issues:

List of Broken Links or No Domain

Url	Comment	Error Type
https://www.shoppinpal.com/		broken
https://www.pitagorinesgroup.com/en/		broken
https://www.fundrails.com/		broken
https://humansofcode.com/		nodomain
https://godaddy.com/		redirect
https://flightoffice.com/		nodomain
https://pubpointsmartdraw.cloud/		nodomain
http://www.eycgrupo.com/		nodomain
https://strongloop.com/strongblog/tag_LoopBack.html	Stay in the Loop	nodomain
https://strongloop.com/strongblog/	StrongLoop Blog	nodomain

I don't have the time today to address the issue, but I plan to work on it on Monday. Let me know if someone else can address the issue sooner. Thanks P-)

@dhmlau, Can we have the label set to doc?