fix(deps): update dependency snyk to v1.956.0

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
snyk	1.954.0 -> 1.956.0

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Release Notes

snyk/snyk

### [`v1.956.0`](https://togithub.com/snyk/cli/releases/tag/v1.956.0) [Compare Source](https://togithub.com/snyk/snyk/compare/v1.955.0...v1.956.0) ##### Bug Fixes - support HTTP(S) proxies in iac-test ([3ac3ad0](https://togithub.com/snyk/snyk/commit/3ac3ad08cf7d23ed3d7461587d6a441937f5b0ff)) ### [`v1.955.0`](https://togithub.com/snyk/cli/releases/tag/v1.955.0) [Compare Source](https://togithub.com/snyk/snyk/compare/v1.954.0...v1.955.0) ##### Bug Fixes - also add HTTP_PROXY environment variable ([78d0602](https://togithub.com/snyk/snyk/commit/78d0602a2efc700084c5f05a3105c8124e0daf0e)) ##### Features - add support for requirements.txt files with BOM encoding ([d31974f](https://togithub.com/snyk/snyk/commit/d31974f735acd6bc25cc504a4cd4abed4126b189)) - support for unmanaged snyk-to-html ([83b4f6a](https://togithub.com/snyk/snyk/commit/83b4f6ae240750ddad824c8d9427db8601b4cd4d))

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