Fix path for Pairwise Sequence Classification

[rinapch]

PR Description

Hey! It's a tiny PR about fixing the path to PairwiseSequenceClassificationExplainer in README.md. Currently it's

from transformers_interpret.explainers.sequence_classification import PairwiseSequenceClassificationExplainer

Should be either from transformers_interpret.explainers.text.sequence_classification import PairwiseSequenceClassificationExplainer or just from transformers_interpret import PairwiseSequenceClassificationExplainer. The latter is more universal, so I fixed it

Also added a couple of lines in CONTRIBUTION.md about needing to fork the repo in order to create a PR. Maybe it's self-evident, but I definitely tried pushing directly at first :D So maybe it'll help someone in the future

Motivation and Context

The path from transformers_interpret.explainers.sequence_classification import PairwiseSequenceClassificationExplainer is broken

Tests and Coverage

I assume there are no tests for docs ¯_(ツ)_/¯

Types of changes

• [ ] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [x] Docs (Added to or improved Transformers Interpret's documentation)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)

Final Checklist:

• [x] My code follows the code style of this project.
• [x] I have updated the documentation accordingly.
• [ ] I have added tests to cover my changes.
• [ ] All new and existing tests passed.

[cdpierse]

Hey sorry for getting to this late, thanks for spotting this, really appreciated, merging now !