Fix multi rrd on app.rerun.io

[jprochazk]

What

• Closes Repeated url= params no longer works in 0.17 #6971

Landing PR: https://github.com/rerun-io/landing/pull/1004

Checklist

• I have read and agree to Contributor Guide and the Code of Conduct
• I've included a screenshot or gif (if applicable)
• I have tested the web demo (if applicable):
  • Using examples from latest main build: rerun.io/viewer
  • Using full set of examples from nightly build: rerun.io/viewer
• The PR title and labels are set such as to maximize their usefulness for the next release's CHANGELOG
• If applicable, add a new check to the release checklist!
• If have noted any breaking changes to the log API in CHANGELOG.md and the migration guide

• PR Build Summary
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[jprochazk]

https://app.rerun.io/pr/6972/index.html?url=https://app.rerun.io/commit/05853c6/examples/human_pose_tracking.rrd&url=https://app.rerun.io/commit/05853c6/examples/arkit_scenes.rrd