Fix urls notation to make the share button URL accesible

[kollivier]

Summary

Title says it all!

Reviewer guidance

Please wait to approve and merge until I can confirm that the whl built by this PR fixes the share button issue!

References

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Contributor Checklist

PR process:

• PR has the correct target branch and milestone
• PR has 'needs review' or 'work-in-progress' label
• If PR is ready for review, a reviewer has been added. (Don't use 'Assignees')
• If this is an important user-facing change, PR or related issue has a 'changelog' label
• If this includes an internal dependency change, a link to the diff is provided

Testing:

• Contributor has fully tested the PR manually
• If there are any front-end changes, before/after screenshots are included
• Critical user journeys are covered by Gherkin stories
• Critical and brittle code paths are covered by unit tests

Reviewer Checklist

• Automated test coverage is satisfactory
• PR is fully functional
• PR has been tested for accessibility regressions
• External dependency files were updated if necessary (yarn and pip)
• Documentation is updated
• Contributor is in AUTHORS.md

[codecov]

Codecov Report

Merging #7228 into release-v0.14.x will decrease coverage by 0.01%.
The diff coverage is 0.00%.

Impacted Files	Coverage Δ
kolibri/core/assets/src/utils/appCapabilities.js	27.27% <0.00%> (ø)
.../views/language-switcher/LanguageSwitcherModal.vue	23.52% <0.00%> (-9.81%)	⬇️
...libri/plugins/user/assets/src/views/SignInPage.vue	33.33% <0.00%> (-0.87%)	⬇️
kolibri/utils/system.py	28.85% <0.00%> (-0.56%)	⬇️
...lugins/facility/assets/src/views/FacilityIndex.vue	0.00% <0.00%> (ø)
...ice/assets/src/views/UserPermissionsPage/index.vue	0.00% <0.00%> (ø)
...ssets/src/views/ManagePermissionsPage/UserGrid.vue	0.00% <0.00%> (ø)
kolibri/utils/cli.py	64.73% <0.00%> (+0.48%)	⬆️
kolibri/core/negotiation.py	100.00% <0.00%> (+16.66%)	⬆️

[rtibbles]

I can confirm this fix is correct, but will not approve until the share button working has been confirmed!

[rtibbles]

Code is correct, and confirmed as working!