Big Fix (wandb_writer): correct spelling mistake

[lorr1]

Writer_config was misspelled as write_config to get the group for wandb.

[codecov[bot]]

Codecov Report

Merging #119 (daa4d7d) into master (804a40f) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #119   +/-   ##
=======================================
  Coverage   92.14%   92.14%           
=======================================
  Files          40       40           
  Lines        2024     2024           
  Branches      456      456           
=======================================
  Hits         1865     1865           
  Misses         94       94           
  Partials       65       65           

Flag	Coverage Δ
unittests	92.14% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
src/emmental/logging/wandb_writer.py	69.23% <ø> (ø)

[senwu]

Nice catch up!