Update src/concepts/analysis_gotchas.md

mozilla · Dec 7, 2023 · d7ad946 · d7ad946
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diff --git a/src/concepts/analysis_gotchas.md b/src/concepts/analysis_gotchas.md
@@ -28,7 +28,7 @@ See also [the spreadsheet of notable historic events](https://docs.google.com/sp
 
 When you start to evaluate trends, be aware of events from the past that may invite comparisons with history. Here are a few to keep in mind:
 
-- **Nov 20, 2023** - Changeover day for Onboarding data sent via Messaging System from PingCentre to Glean. Views and datasets downstream of messaging_system.onboarding [began being fueled by Glean-sent data instead of PingCentre-sent data](https://github.com/mozilla/bigquery-etl/pull/4457).
+- **Nov 20, 2023** - Changeover day for Onboarding data sent via Messaging System from PingCentre to Glean. Views and datasets downstream of `messaging_system.onboarding` [began being fueled by Glean-sent data instead of PingCentre-sent data](https://github.com/mozilla/bigquery-etl/pull/4457).
 - **Jul 16, 2023 - Jul 24, 2023** - During the migration from release to ESR of Firefox users on obsolete versions of MacOS and Windows, Firefox sent deletion request pings for clients in the migration, which also reset the `client_id`. [See the summary of the incident here.](https://docs.google.com/document/d/1vdn9OFSoKPD5wt14dmTwyh0kGs-96fWx26ESui95jo0/edit). Approximately 2 million clients were affected by this bug; as a result of this, around 1.3 million clients were double counted due to both the old `client_id` and reset `client_id` being active on the same day.
 - **Mar 17, 2023 - May 9, 2023** - Firefox for Android was collecting but not sending `perf.page_load` events during this period. The recorded events started being sent after May 9, 2023 resulting in a spike of events that eventually returned to normal levels. [See Bug 1833178 for more info.][bug1833178]
 - **Mar 14, 2023** - Firefox for Android began reporting significantly fewer new installs, due to [a fix for Client ID regeneration](https://docs.google.com/document/d/1Tf8F2FndPsOAWc7peLxgUZd4t-LUJu8RMotiDhgKF7I/edit#heading=h.xyargldz6xg0). This also affected retention for both new and existing users.