Update an external reference to matrix synapse documentation#951

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frlan wants to merge 1 commit intomatrix-org:mainfrom

frlan:doc/element.hq-migration-of-doc-setup

Commits on Jul 14, 2024

Update external reference to matrix synapse to point to new https://matrix-org.github.io -> https://element-hq.github.io domain after synapse 1.98 inside setup documentation
frlan
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