chore(deps): update dependency prisma to v1.26.6

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change	References
prisma	devDependencies	patch	1.26.4 -> 1.26.6	source

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Release Notes

prisma/prisma

### [`v1.26.6`](https://togithub.com/prisma/prisma/releases/1.26.6) [Compare Source](https://togithub.com/prisma/prisma/compare/1.26.4...1.26.6) #### Fixes - [`8489c2c`](https://togithub.com/prisma/prisma/commit/8489c2c) Fix cluster fetching - Unnecessary calls to fetch for clusters have been removed for better performance. - Fix problems with using existing databases with the Mongo and MySQL connectors [#​4054](https://togithub.com/prisma/prisma/pull/4054)

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