fix: CI breakage

[aarnphm]

• bumping base python version for actions/python to 3.8
• unrestrict protobuf requirements for tests

Signed-off-by: Aaron Pham [email protected]

[codecov]

Codecov Report

Merging #3350 (acde82a) into main (d7254c0) will increase coverage by 0.11%.
The diff coverage is n/a.

❗ Current head acde82a differs from pull request most recent head c5dec55. Consider uploading reports for the commit c5dec55 to get more accurate results

@@            Coverage Diff             @@
##             main    #3350      +/-   ##
==========================================
+ Coverage   33.12%   33.23%   +0.11%     
==========================================
  Files         132      132              
  Lines       10626    10641      +15     
  Branches     1776     1778       +2     
==========================================
+ Hits         3520     3537      +17     
+ Misses       6869     6866       -3     
- Partials      237      238       +1     

Impacted Files	Coverage Δ
src/bentoml/pytorch.py	0.00% <0.00%> (ø)
src/bentoml/torchscript.py	0.00% <0.00%> (ø)
src/bentoml/picklable_model.py	100.00% <0.00%> (ø)
src/bentoml/_internal/frameworks/keras.py	0.00% <0.00%> (ø)
src/bentoml/_internal/frameworks/pytorch.py	0.00% <0.00%> (ø)
src/bentoml/_internal/frameworks/torchscript.py	0.00% <0.00%> (ø)
src/bentoml/_internal/frameworks/transformers.py	0.00% <0.00%> (ø)
src/bentoml/_internal/frameworks/tensorflow_v2.py	0.00% <0.00%> (ø)
src/bentoml/_internal/frameworks/common/pytorch.py	0.00% <0.00%> (ø)
src/bentoml/_internal/frameworks/picklable.py	73.33% <0.00%> (+2.42%)	⬆️
... and 1 more