FIX: ci invalid cache

[martins0n]

Before submitting (must do checklist)

• Did you read the contribution guide?
• Did you update the docs? We use Numpy format for all the methods and classes.
• Did you write any new necessary tests?
• Did you update the CHANGELOG?

Proposed Changes

Closing issues

[github-actions]

🚀 Deployed on https://deploy-preview-896--etna-docs.netlify.app

[codecov-commenter]

Codecov Report

Merging #896 (446bdeb) into master (be73043) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #896   +/-   ##
=======================================
  Coverage   84.90%   84.90%           
=======================================
  Files         133      133           
  Lines        7545     7548    +3     
=======================================
+ Hits         6406     6409    +3     
  Misses       1139     1139           

Impacted Files	Coverage Δ
etna/commands/backtest_command.py	97.05% <100.00%> (ø)
etna/commands/forecast_command.py	94.87% <100.00%> (ø)
etna/models/utils.py	100.00% <0.00%> (ø)
etna/models/nn/mlp.py	100.00% <0.00%> (ø)
etna/models/nn/rnn.py	100.00% <0.00%> (ø)

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