changelog: clearify slugs

CHANGELOG.md

@@ -21,7 +21,7 @@ The breaking changes in this release will not break anything, however some behav
 
 * Changed timestamp for Graphite/InfluxDB metrics/annotations. The old implementation used the start time for the test all metrics sent except *browsertime.run* metrics (data for each run). This fix changes so metrics (and annotations) uses the *browsertime.pageSummary* runTime (when the actual first iteration happen for a test). This makes more sense if you test multiple pages within the same test [#3900](https://github.com/sitespeedio/sitespeed.io/pull/3900).
 
-* When the slug concept was introduced in 17.0.0 also a bug was accidently added that add the domain as a slug if the slug was missing. As long as you added `--slug` that was not a problem and you will not be affected by this bug. However if you do not use `--slug` (you really should since 20.0.0) the slug portion would be automatically populated [#3901](https://github.com/sitespeedio/sitespeed.io/pull/3901).
+* When the slug concept was introduced in 17.0.0 also a bug was accidently added that add the domain as a slug if the slug was missing. As long as you added `--slug` that was not a problem and you will not be affected by this bug. However if you do not use `--slug` (you really should since 20.0.0) the slug portion would be automatically populated [#3901](https://github.com/sitespeedio/sitespeed.io/pull/3901) with the domain. If you send your metrics to Graphite and do not use `--slug` and use the dashboard that use the slug, you need to add `--slug` to your run for your dashboards to continue to work.
 
 ### Fixed
 * Crux: Remove experimental from INP when getting Crux data [#3906](https://github.com/sitespeedio/sitespeed.io/pull/3906).