chore(deps-dev): bump dotenv-flow from 3.3.0 to 4.0.0

Bumps [dotenv-flow](https://github.com/kerimdzhanov/dotenv-flow) from 3.3.0 to 4.0.0.
- [Release notes](https://github.com/kerimdzhanov/dotenv-flow/releases)
- [Changelog](https://github.com/kerimdzhanov/dotenv-flow/blob/master/CHANGELOG.md)
- [Commits](https://github.com/kerimdzhanov/dotenv-flow/compare/v3.3.0...v4.0.0)

---
updated-dependencies:
- dependency-name: dotenv-flow
  dependency-type: direct:development
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

package.json

@@ -37,7 +37,7 @@
     "autoprefixer": "^10.4.16",
     "child_process": "^1.0.2",
     "clean-css": "^5.3.2",
-    "dotenv-flow": "^3.3.0",
+    "dotenv-flow": "^4.0.0",
     "eleventy-plugin-tabler-icons": "^2.0.7",
     "eleventy-plugin-unfurl": "^1.0.0",
     "eleventy-plugin-youtube-embed": "^1.9.0",