update codecov token reference

Author: CosmoMatt

.github/workflows/tests.yml

@@ -34,5 +34,5 @@ jobs:
     
     - name: Run tests
       run: |
-        pytest --cov-report term --cov=s2wav --cov-config=.coveragerc 
+        pytest --cov-report term --cov=s2fft --cov-config=.coveragerc 
         codecov --token 298dc7ee-bb9f-4221-b31f-3576cc6cb702