STYLE: Increase consistency in dependency pinning specification

Increase consistency in dependency pinning specification: remove spaces
and adopt compact notation for `nipype` in `pyproject.toml` as used for
the rest of the dependencies.

pyproject.toml

@@ -22,7 +22,7 @@ requires-python = ">=3.10"
 dependencies = [
     "dipy>=1.3.0",
     "joblib",
-    "nipype>= 1.5.1, < 2.0",
+    "nipype>= 1.5.1,<2.0",
     "nitransforms>=21.0.0,<24",
     "nireports",
     "numpy>=1.17.3",