Update dependency probot to v13.4.0

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
probot (source)	13.3.10 -> 13.4.0

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Release Notes

probot/probot (probot)

### [`v13.4.0`](https://redirect.github.com/probot/probot/releases/tag/v13.4.0) [Compare Source](https://redirect.github.com/probot/probot/compare/v13.3.10...v13.4.0) ##### Features - allow custom logger for Octokit instances ([#​2100](https://redirect.github.com/probot/probot/issues/2100)) ([19954c8](https://redirect.github.com/probot/probot/commit/19954c8bd1a5cd3e14dfe918315aa7818a4766ce))

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