update config for latest sphinxcontrib-bibtex (#84)

mmcky · AakashGfude · commit de18ce874ffc · 2021-02-09T16:33:05.000+11:00
diff --git a/lectures/_config.yml b/lectures/_config.yml
@@ -7,6 +7,9 @@ execute:
   execute_notebooks: "cache"
   timeout: 60
 
+bibtex_bibfiles:
+   - _static/quant-econ.bib
+
 html:
   baseurl: https://python.quantecon.org/
 
