Update README.md in VAE example

[tisabe]

Deleted outdated --workdir flag in bash command, as discussed in #3666.

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[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (8995420) 56.12% compared to head (22a1c59) 56.12%. Report is 8 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3671   +/-   ##
=======================================
  Coverage   56.12%   56.12%           
=======================================
  Files         102      102           
  Lines       12180    12180           
=======================================
  Hits         6836     6836           
  Misses       5344     5344           

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