Update paper.bib (#82)

fix executable book community ref

Author: e-marshall

paper.bib

@@ -342,7 +342,7 @@ @misc{JupyterBookCommunity_2021
         url={https://doi.org/10.5281/zenodo.4539666}, 
         DOI={10.5281/zenodo.4539666}, 
         publisher={Zenodo}, 
-        author={Executable Books Community}, 
+        author={{Executable Books Community}}, 
         year={2021}, month=feb }
 
  @misc{Gillies_van_der_Wel_Van_den_Bossche_Taves_Arnott_Ward_others_2022,