Fix Pylint capitalization across pre-commit config

[deepyaman]

Description

Minor fix I stumbled upon while messing with CausalNex. If you look at Pylint repo/docs, it's never capitalized as "PyLint".

Development notes

Checklist

• Read the contributing guidelines
• Opened this PR as a 'Draft Pull Request' if it is work-in-progress
• Updated the documentation to reflect the code changes
• Added a description of this change and added my name to the list of supporting contributions in the RELEASE.md file
• Added tests to cover my changes

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[merelcht]

Thanks @deepyaman 🥇 👍

[yetudada]

Thank you for this @deepyaman 🚀