`at://did:web:pds.mk.gg/app.bsky.feed.post` is an invalid URI

[tom-sherman]

For some reason at://did:web:pds.mk.gg/app.bsky.feed.post presents as an invalid URI in atproto-browser, as does at://did:web:pds.mk.gg/app.bsky.feed.post/rkey.