[docs] missing newline

Author: krivard

docs/api/covidcast-signals/chng.md

@@ -35,6 +35,7 @@ commercial purposes.
 | `smoothed_adj_outpatient_cli` | Same, but with systematic day-of-week effects removed; see [details below](#day-of-week-adjustment) <br/> **Earliest date available:** 2020-02-01 |
 | `smoothed_outpatient_flu` | Estimated percentage of outpatient doctor visits with confirmed influenza, based on Change Healthcare claims data that has been de-identified in accordance with HIPAA privacy regulations, smoothed in time using a Gaussian linear smoother <br/> **Earliest issue available:** 2021-12-06 <br/> **Earliest date available:** 2020-02-01 |
 | `smoothed_adj_outpatient_flu` | Same, but with systematic day-of-week effects removed; see [details below](#day-of-week-adjustment) <br/> **Earliest issue available:** 2021-12-06 <br/> **Earliest date available:** 2020-02-01 |
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 ## Table of Contents
 {: .no_toc .text-delta}