Update dependency dotenv-webpack to v8

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
dotenv-webpack	^7.0.2 -> ^8.0.0

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Release Notes

mrsteele/dotenv-webpack (dotenv-webpack)

### [`v8.1.0`](https://togithub.com/mrsteele/dotenv-webpack/releases/tag/v8.1.0) [Compare Source](https://togithub.com/mrsteele/dotenv-webpack/compare/v8.0.1...v8.1.0) ##### Features - compatible with rspack ([f32653e](https://togithub.com/mrsteele/dotenv-webpack/commit/f32653e03ac75ef087527992cc27f52a7d412efc)) - Merge pull request [#​501](https://togithub.com/mrsteele/dotenv-webpack/issues/501) from ahabhgk/compat-rspack ([c6ebc71](https://togithub.com/mrsteele/dotenv-webpack/commit/c6ebc715ea32f3444b9e3e2174718e5322752d94)) ### [`v8.0.1`](https://togithub.com/mrsteele/dotenv-webpack/releases/tag/v8.0.1) [Compare Source](https://togithub.com/mrsteele/dotenv-webpack/compare/v8.0.0...v8.0.1) ##### Bug Fixes - bump terser from 5.14.1 to 5.14.2 ([#​488](https://togithub.com/mrsteele/dotenv-webpack/issues/488)) ([97a864d](https://togithub.com/mrsteele/dotenv-webpack/commit/97a864d72302d25fad0cef618fcd3f09e94bc4e4)) ### [`v8.0.0`](https://togithub.com/mrsteele/dotenv-webpack/releases/tag/v8.0.0) [Compare Source](https://togithub.com/mrsteele/dotenv-webpack/compare/v7.1.1...v8.0.0) ##### Bug Fixes - Extending custom path support ([#​487](https://togithub.com/mrsteele/dotenv-webpack/issues/487)) ([f5d79ee](https://togithub.com/mrsteele/dotenv-webpack/commit/f5d79eefe27d6c8fc62c8a9312f38811b1600623)) ##### BREAKING CHANGES - The `path`, `defaults` and `safe` props all look at the `path` by default. Please be advised.

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Configuration

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