Update conf.py

3 jobs for master in 1 minute and 20 seconds (queued for 17 seconds)
Status Name Job ID Coverage
  Test
failed compile_pdf #917

00:00:40

passed pages #916

00:00:40

 
  Deploy
passed pages:deploy

00:00:00

 
Name Stage Failure
failed
compile_pdf Test
      Refer to 'FabAcademy2018.log' for details
Latexmk: Use the -f option to force complete processing,
unless error was exceeding maximum runs, or warnings treated as errors.
=== TeX engine is 'pdfTeX'
Latexmk: Errors, so I did not complete making targets
make[1]: *** [Makefile:33: FabAcademy2018.pdf] Error 12
make[1]: Leaving directory '/builds/docs/open-data/open-data-goldbook/_build/latex'
make: *** [Makefile:141: latexpdf] Error 2
ERROR: Job failed: exit code 1