fix typo on readme

Author: zm711

README.md

@@ -134,4 +134,4 @@ If you find SpikeInterface useful in your research, please cite:
 ```
 
 Please also cite other relevant papers for the specific components you use.
-For a ful list of references, please check the [references](https://spikeinterface.readthedocs.io/en/latest/references.html) page.
+For a full list of references, please check the [references](https://spikeinterface.readthedocs.io/en/latest/references.html) page.