Update README.md (#176)

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## Describe Your Changes


## Non-Obvious Technical Information


## Checklist Before Requesting a Review
- [ ] The code runs successfully.

```commandline
HERE IS SOME COMMAND LINE OUTPUT
```

README.md

@@ -1,5 +1,5 @@
 # Prijateli Tree
-`PrijateliTree` is an oTree application used to play lab games and collect survey data.
+`PrijateliTree` is a FastAPI application used to play lab games.
 The games are a means to provide insights into social learning, the economics of languages and other human behaviors.
 
 ## Application Requirements