Update nanobind requirement from <2.5.0 to <2.7.0

Updates the requirements on [nanobind](https://github.com/wjakob/nanobind) to permit the latest version.
- [Changelog](https://github.com/wjakob/nanobind/blob/master/docs/changelog.rst)
- [Commits](wjakob/nanobind@v0.0.1...v2.6.1)

---
updated-dependencies:
- dependency-name: nanobind
  dependency-version: 2.6.1
  dependency-type: direct:production
...

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

Author: dependabot[bot]

pyproject.toml

@@ -45,7 +45,7 @@ develop = [
     "twine",
     "wheel",
     # test
-    "nanobind<2.5.0",  # https://github.com/wjakob/nanobind/commit/abd27e3b5565bc95f5091321f0f863fce8b5b95b
+    "nanobind<2.7.0",  # https://github.com/wjakob/nanobind/commit/abd27e3b5565bc95f5091321f0f863fce8b5b95b
     "pybind11",
     "pytest",
     "pytest-cov",