fix missing hub uuid error

[matthewhilton]

The issue

• A few months ago there was an update to the library submodule that added some error messages, however, the HUB registration error - Missing Site UUID or Hub Secret. Please check your Hub registration message was incorrect and would show even if the hub was not enabled.
• See https://h5ptechnology.atlassian.net/browse/HFP-3883
• This was fixed in a newer version of the library submodule

The fix

• Updated the library submodule to this version. Since this is a fork, I tried to update as little as possible to avoid any regressions to only updated to the exact hash needed.
• Comparing the diff, it seems to very minor things e.g. fonts. If these do end up causing regressions we can easily roll it back and handle it another way.

Testing
To reproduce the bug you can do:

• Ensure the hub is not enabled / not used.
• View the admin settings any page, this just triggers h5p to query the hub info and queue the error in your session.
• View any h5p, this will then dequeue these errors all at once.

After updating the library submodule, the errors are no longer shown.

[matthewhilton]

Note CI is failing due to pre-existing issues, checking the CI, the tests are passing which is what really matters here.

[keevan]

All the changes seem sane and relatively safe. This one (h5p/h5p-php-library@3e1f903) is mildly interesting but I'm assuming the flexible handling for importing it is already there.

Going to mark this one as okay overall since it's from upstream.