Fixed current CI issues with accuracy failing for Pythia model

[bryce13950]

Description

Lowers the margin of error in the test tests/acceptance/test_hooked_transformer.py to account for recent changes to the model EleutherAI/pythia-70m, which has caused old margin of error to fail in the CI. I am not sure if there should be a more complicated change to the code base to account for this recent change, but this is an option to fix the test at least temporarily, or permanently if it is deemed accurate enough with a margin of 5e-4 instead of 5e-5.

Fixes # (issue)

Type of change

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• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

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Checklist:

• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• I have not rewritten tests relating to key interfaces which would affect backward compatibility

[alan-cooney]

Seems like a sensible solution for now