fix(py-ray): constrain to older bazel

I just hit https://github.com/ray-project/ray/issues/31504 when trying to build
ebrains on a unconstrained spack (0.20.x) → bazel 6.1.1 is too new for py-ray.

packages/py-ray/package.py

@@ -20,7 +20,7 @@ class PyRay(PythonPackage):
 
     depends_on("python@3.6:3.10", when="@2.0.1", type=("build", "run"))
     depends_on("python@3.6:3.8", when="@0.8.7", type=("build", "run"))
-    depends_on("bazel@4.2.2:", when="@2.0.1", type="build")
+    depends_on("bazel@4.2.2:5", when="@2.0.1", type="build")
     depends_on("bazel@3.2.0", when="@0.8.7", type="build")
     depends_on("npm", type="build")
     depends_on("py-setuptools", type="build")