fix lso dos of lobster being not saved in schema

[naik-aakash]

Summary

Schema update
Issue - LSO DOSCAR from lobster did not get added due to a missing file extension
Fix - update the schema to fix this issue

[codecov]

Codecov Report

Merging #279 (3cc00a6) into main (161f685) will decrease coverage by 0.16%.
The diff coverage is 100.00%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #279      +/-   ##
==========================================
- Coverage   65.89%   65.73%   -0.16%     
==========================================
  Files          73       73              
  Lines        7039     7039              
  Branches      897      897              
==========================================
- Hits         4638     4627      -11     
- Misses       2137     2149      +12     
+ Partials      264      263       -1     

Impacted Files	Coverage Δ
src/atomate2/lobster/schemas.py	92.82% <100.00%> (ø)

... and 1 file with indirect coverage changes

[naik-aakash]

Hi @utf , Can you please merge this PR. It is one minor change in the code. Thank you for the help 😄

[utf]

Thanks!