Update links to all deployed apps

Author: mine-cetinkaya-rundel

README.md

@@ -4,4 +4,7 @@ ShinyEd
 Statistics education apps created in Shiny. Source code available on GitHub. 
 
 - CLT_mean: [openintro.shinyapps.io/CLT_mean](https://openintro.shinyapps.io/CLT_mean/)]
-- CLT_prop: [openintro.shinyapps.io/CLT_prop](https://openintro.shinyapps.io/CLT_prop/)
+- CLT_prop: [openintro.shinyapps.io/CLT_prop](https://openintro.shinyapps.io/CLT_prop/)
+- Correlation game: [openintro.shinyapps.io/correlation_game](https://openintro.shinyapps.io/correlation_game/)
+- Distribution calculator: [openintro.shinyapps.io/dist_calc](https://openintro.shinyapps.io/dist_calc/)
+- Diagnostics for simple linear regression: [openintro.shinyapps.io/slr_diag](https://openintro.shinyapps.io/slr_diag/)