fix bib file with ,

00e4a0f3 · Felix Hilsky · fa51ecb3 · 00e4a0f3
Commit 00e4a0f3 authored Jan 12, 2022 by Felix Hilsky
--- a/tex/bibliography.bib
+++ b/tex/bibliography.bib
@@ -19,7 +19,7 @@
 }
 @article{Nitschke2018,
  doi = {10.1098/rspa.2017.0686},
-  url = {https://royalsocietypublishing.org/doi/10.1098/rspa.2017.0686}
+  url = {https://royalsocietypublishing.org/doi/10.1098/rspa.2017.0686},
  year = {2018},
  month = jun,
  publisher = {The Royal Society},