Update README.md

Author: nesscoder

README.md

@@ -49,7 +49,7 @@ The TimeTrial Git Repository includes the following:
 
 ***
 TimeTrial is Currently in Preprint on BioRxiv:
-[See Article](doi.org/10.1101/2020.04.15.043695)
+[See Article](https://doi.org/10.1101/2020.04.15.043695)
 
 Ness-Cohn, E., Iwanaszko, M., Kath, W. L., Allada, R. & Braun, R. TimeTrial: An Interactive Application for Optimizing the Design and Analysis of Transcriptomic Times-Series Data in Circadian Biology Research. bioRxiv 2020.04.15.043695 (2020). doi:10.1101/2020.04.15.043695