chore(deps): bump httptools from 0.6.1 to 0.6.4

Bumps [httptools](https://github.com/MagicStack/httptools) from 0.6.1 to 0.6.4.
- [Release notes](https://github.com/MagicStack/httptools/releases)
- [Commits](MagicStack/httptools@v0.6.1...v0.6.4)

---
updated-dependencies:
- dependency-name: httptools
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

requirements.txt

@@ -18,7 +18,7 @@ gevent==24.2.1
 greenlet==3.1.1
 h11==0.14.0
 httpcore==1.0.6
-httptools==0.6.1
+httptools==0.6.4
 httpx==0.27.2
 idna==3.8
 iniconfig==2.0.0