Incorrect pre-commit setup instructions link in GH PR template

[Skanislav]

execution-specs/.github/PULL_REQUEST_TEMPLATE.md

Line 12 in d844821

- [ ] All: Ran fast static checks to avoid unnecessary CI fails, see also [Code Standards](https://eest.ethereum.org/main/getting_started/code_standards/) and [Enabling Pre-commit Checks](https://eest.ethereum.org/main/dev/precommit/):

Link for pre-commit instalation instructions returns 404
https://eest.ethereum.org/main/dev/precommit/