Improve changelog for @source not (#17375)

We didn't add a changelog for the PR
(#17255) and there are a
few things we need to talk about. So opened this PR to get everything in
and once we're happy we can merge it in one go instead of changing on
`main` directly.

---------

Co-authored-by: Philipp Spiess <hello@philippspiess.com>

Author: RobinMalfait

CHANGELOG.md

@@ -25,9 +25,14 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Fixed
 
 - Fix symlink issues when resolving `@source` directives ([#17391](https://github.com/tailwindlabs/tailwindcss/pull/17391))
+- `@tailwindcss/cli` considers ignore rules in `--watch` mode ([#17255](https://github.com/tailwindlabs/tailwindcss/pull/17255))
+- Fix negated `content` rules in legacy JavaScript configuration ([#17255](https://github.com/tailwindlabs/tailwindcss/pull/17255))
 
 ### Changed
 
+- Ignore `node_modules` by default (but can be overridden by `@source not …` rules) ([#17255](https://github.com/tailwindlabs/tailwindcss/pull/17255))
+- Order of `@source` rules matter if you want to negate previous `@source` rules ([#17255](https://github.com/tailwindlabs/tailwindcss/pull/17255))
+- `@source` rules that include file extensions or point inside `node_modules/` no longer consider `.gitignore` rules ([#17255](https://github.com/tailwindlabs/tailwindcss/pull/17255))
 - Deprecated `bg-{left,right}-{top,bottom}` utilities ([#17378](https://github.com/tailwindlabs/tailwindcss/pull/17378))
 
 ## [4.0.17] - 2025-03-26