Also change tense of dashboard text

Author: capnrefsmmat

content/covidcast/survey-results.md

@@ -2,7 +2,7 @@
 title: COVIDcast | CTIS Dashboard
 linkTitle: CTIS Dashboard
 description: |
-  In collaboration with Facebook Data for Good, along with a consortium of universities and public health officials, the Delphi Group at Carnegie Mellon University conducts research surveys to monitor the spread and impact of the COVID-19 pandemic in the United States. This survey is advertised through Facebook. It has run continuously since early April 2020.
+  In collaboration with Facebook Data for Good, along with a consortium of universities and public health officials, the Delphi Group at Carnegie Mellon University conducted a research survey to monitor the spread and impact of the COVID-19 pandemic in the United States. The survey was advertised through Facebook. It ran continuously from April 6, 2020 to June 25, 2022.
 layout: covidcast_app
 app_mode: survey-results
 order: 5