Fix Issue 19733 - expi documentation links broken

[ghost]

coshisinh link was also broken - fixed that too

[dlang-bot]

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Bugzilla references

Auto-close	Bugzilla	Severity	Description
✓	19733	trivial	expi documentation links broken

Testing this PR locally

If you don't have a local development environment setup, you can use Digger to test this PR:

dub fetch digger
dub run digger -- build "master + phobos#7304"