Corrects the usage example

README.md

@@ -44,10 +44,10 @@ t_end = '2022-09-08'
 stime = a.Time(t_start, t_end)
 level = a.Level('LL02')
 
-sis = SIS(stime, level=level)
-sis.search()
-sis.fetch()
-sis.load()
+sis = SIS()
+response = sis.search(stime, level=level)
+files = sis.fetch(response)
+sis.load(files)
 ```
 
 ## 📦 Useful Python packages
@@ -60,6 +60,6 @@ sis.load()
 
 This software is provided "as is", with no guarantee. It is not an official data source, and not officially endorsed by the corresponding instrument team.
 
-## 📜 Acknowledging or Citing _SolO-SIS-Loader_ [![https://doi.org/](https://zenodo.org/badge/)](https://doi.org/)
+## 📜 Acknowledging or Citing _SolO-SIS-Loader_
 
 If you use _SolO-SIS-Loader_ for scientific work or research presented in a publication, please mention it in the main text and in the methods or acknowledgements section add the following: "This research has made use of SolO-SIS-Loader, a python data loader for Suprathermal Ion Spectrograph (SIS) instrument onboard Solar Orbiter's (SolO) (Zenodo: [https://doi.org/](https://doi.org/)).". You may also acknowledge _SolO-SIS-Loader_ in posters or talks in the way you prefer. _SolO-SIS-Loader_ has a strong dependency on SunPy and AstroPy Python packages, consider citing these packages as well.