* Add SpaceTradersAPI

-[x] My submission is formatted according to the guidelines in the contributing guide
-[x] My addition is ordered alphabetically
-[x] My submission has a useful description
-[x] The description does not end with punctuation
-[x] Each table column is padded with one space on either side
-[x] I have searched the repository for any relevant issues or pull requests
-[x] Any category I am creating has the minimum requirement of 3 items
-[x] All changes have been squashed into a single commit

I removed the required lines

Note: The PR #1085 is inative.

Resolve #1085

As reported in #1660

Update README.md

Update README.md

Remove duplicate weatherstack entry.

 Only leave it in the Weather section.

Squash commits.

Note:
    The user deleted the fork from this project, so it will not be possible to resolve the conflict for the merger.

Close #1281

Removed inactive Linkedin API

As per requested @marekdano

As requested by the reviewer PR updated in order to fix API duplication and missing https for hubblesite.

Indeed has discontinued their API. See https://stackoverflow.com/a/66036140/13752077

The PR #1610 added an duplicate link to the government section

The PR #1610 added an extra blank line

This isn't an API but rather the site where they are collated by the UK
government.

I've added the data.gov.uk site as a separate entry for clarity (because
of the number of similar sites from other countries). This site is also
linked to from the API catalogue site.

Removed .com from wecantrack.com

Fixes the issue #1307

The links https://plino.herokuapp.com and https://sentim-api.herokuapp.com were broken

Mozilla Observatory ordered alphabetically