Schedule Ian's talk about historical data benchmark for review

Change-Id: Ib275814c0960f5c8fc3be006b6c427d5d2d4287f
diff --git a/schedule.md b/schedule.md
index f787735..1259137 100644
--- a/schedule.md
+++ b/schedule.md
@@ -10,7 +10,7 @@
 |  9:10 PST / 18:10 CET | [Submit Requirements: Waving goodbye to Prolog](sessions/submit-requirements.md)        |
 |  9:40 PST / 18:40 CET | [Code Owners: Demo of the `code-owners` plugin](sessions/code-owners.md)                |
 | 10:10 PST / 19:10 CET | [Using GitHub Actions with GerritHub](lightning-talks/gerrithub-and-github-actions.md)  |
-| 10:20 PDT / 19:20 CET | Lightning talk 2 - __available for proposals__                                          |
+| 10:20 PDT / 19:20 CET | [Is Historical Data An Appropriate Benchmark For Review Recommendation Systems?](lightning-talks/Is-Historical-Data-an-Appropriate-Benchmark-For-Review-Recommendation-Systems.md) |
 | 10:30 PDT / 19:30 CET | Lightning talk 3 - __available for proposals__                                          |
 | 10:40 PDT / 19:40 CET | Lightning talk 4 - __available for proposals__                                          |
 | 10:50 PDT / 19:50 CET | Lightning talk 5 - __available for proposals__                                          |